School Science and Mathematics

Cover image for School Science and Mathematics

December 1973

Volume 73, Issue 9

Pages 705–793

  1. Editor's Page

    1. Top of page
    2. Editor's Page
    3. Pollen and Weather
    4. Original Article
    5. Possible Cause of Spinal Bifida
    6. Original Article
    7. Weather Prediction
    8. Original Article
    9. Energy Crisis
    10. Original Article
    11. Radio-Imaging Used to Detect Transplant Rejection, Disease
    12. Original Article
    13. Lung Diseases
    14. Original Article
    15. Extraction of Minerals
    16. Original Article
    17. Make Plans now to Attend
    18. Original Article
    19. Underwater Safety Devices
    20. Original Article
    21. Magnetic Taconite
    22. Original Article
    23. Books and Teaching Aids Received
    24. Book Vignettes
    25. Poison Bite Precautions Can Save Lives
    26. Book Reviews
    1. Oh Where is my Horse's Patoote? (pages 705–706)

      George G. Mallinson

      Article first published online: 17 MAR 2010 | DOI: 10.1111/j.1949-8594.1973.tb09149.x

  2. Pollen and Weather

    1. Top of page
    2. Editor's Page
    3. Pollen and Weather
    4. Original Article
    5. Possible Cause of Spinal Bifida
    6. Original Article
    7. Weather Prediction
    8. Original Article
    9. Energy Crisis
    10. Original Article
    11. Radio-Imaging Used to Detect Transplant Rejection, Disease
    12. Original Article
    13. Lung Diseases
    14. Original Article
    15. Extraction of Minerals
    16. Original Article
    17. Make Plans now to Attend
    18. Original Article
    19. Underwater Safety Devices
    20. Original Article
    21. Magnetic Taconite
    22. Original Article
    23. Books and Teaching Aids Received
    24. Book Vignettes
    25. Poison Bite Precautions Can Save Lives
    26. Book Reviews
    1. POLLEN AND WEATHER (page 706)

      Article first published online: 17 MAR 2010 | DOI: 10.1111/j.1949-8594.1973.tb09150.x

  3. Original Article

    1. Top of page
    2. Editor's Page
    3. Pollen and Weather
    4. Original Article
    5. Possible Cause of Spinal Bifida
    6. Original Article
    7. Weather Prediction
    8. Original Article
    9. Energy Crisis
    10. Original Article
    11. Radio-Imaging Used to Detect Transplant Rejection, Disease
    12. Original Article
    13. Lung Diseases
    14. Original Article
    15. Extraction of Minerals
    16. Original Article
    17. Make Plans now to Attend
    18. Original Article
    19. Underwater Safety Devices
    20. Original Article
    21. Magnetic Taconite
    22. Original Article
    23. Books and Teaching Aids Received
    24. Book Vignettes
    25. Poison Bite Precautions Can Save Lives
    26. Book Reviews
    1. Another View of a Methods Course: An Effective Approach (pages 707–710)

      Francis P. Collea and David L. Pagni

      Article first published online: 17 MAR 2010 | DOI: 10.1111/j.1949-8594.1973.tb09151.x

    2. Some Ideas Concerning the Readability of Classroom Mathematics Materials (pages 711–716)

      Douglas A. Grouws and Richard D. Robinson

      Article first published online: 17 MAR 2010 | DOI: 10.1111/j.1949-8594.1973.tb09152.x

  4. Possible Cause of Spinal Bifida

    1. Top of page
    2. Editor's Page
    3. Pollen and Weather
    4. Original Article
    5. Possible Cause of Spinal Bifida
    6. Original Article
    7. Weather Prediction
    8. Original Article
    9. Energy Crisis
    10. Original Article
    11. Radio-Imaging Used to Detect Transplant Rejection, Disease
    12. Original Article
    13. Lung Diseases
    14. Original Article
    15. Extraction of Minerals
    16. Original Article
    17. Make Plans now to Attend
    18. Original Article
    19. Underwater Safety Devices
    20. Original Article
    21. Magnetic Taconite
    22. Original Article
    23. Books and Teaching Aids Received
    24. Book Vignettes
    25. Poison Bite Precautions Can Save Lives
    26. Book Reviews
    1. POSSIBLE CAUSE OF SPINAL BIFIDA (page 716)

      Article first published online: 17 MAR 2010 | DOI: 10.1111/j.1949-8594.1973.tb09153.x

  5. Original Article

    1. Top of page
    2. Editor's Page
    3. Pollen and Weather
    4. Original Article
    5. Possible Cause of Spinal Bifida
    6. Original Article
    7. Weather Prediction
    8. Original Article
    9. Energy Crisis
    10. Original Article
    11. Radio-Imaging Used to Detect Transplant Rejection, Disease
    12. Original Article
    13. Lung Diseases
    14. Original Article
    15. Extraction of Minerals
    16. Original Article
    17. Make Plans now to Attend
    18. Original Article
    19. Underwater Safety Devices
    20. Original Article
    21. Magnetic Taconite
    22. Original Article
    23. Books and Teaching Aids Received
    24. Book Vignettes
    25. Poison Bite Precautions Can Save Lives
    26. Book Reviews
    1. A Science Curriculum for a Changing Society (pages 717–724)

      Roy D. Meiller

      Article first published online: 17 MAR 2010 | DOI: 10.1111/j.1949-8594.1973.tb09154.x

  6. Weather Prediction

    1. Top of page
    2. Editor's Page
    3. Pollen and Weather
    4. Original Article
    5. Possible Cause of Spinal Bifida
    6. Original Article
    7. Weather Prediction
    8. Original Article
    9. Energy Crisis
    10. Original Article
    11. Radio-Imaging Used to Detect Transplant Rejection, Disease
    12. Original Article
    13. Lung Diseases
    14. Original Article
    15. Extraction of Minerals
    16. Original Article
    17. Make Plans now to Attend
    18. Original Article
    19. Underwater Safety Devices
    20. Original Article
    21. Magnetic Taconite
    22. Original Article
    23. Books and Teaching Aids Received
    24. Book Vignettes
    25. Poison Bite Precautions Can Save Lives
    26. Book Reviews
    1. WEATHER PREDICTION (page 724)

      Article first published online: 17 MAR 2010 | DOI: 10.1111/j.1949-8594.1973.tb09155.x

  7. Original Article

    1. Top of page
    2. Editor's Page
    3. Pollen and Weather
    4. Original Article
    5. Possible Cause of Spinal Bifida
    6. Original Article
    7. Weather Prediction
    8. Original Article
    9. Energy Crisis
    10. Original Article
    11. Radio-Imaging Used to Detect Transplant Rejection, Disease
    12. Original Article
    13. Lung Diseases
    14. Original Article
    15. Extraction of Minerals
    16. Original Article
    17. Make Plans now to Attend
    18. Original Article
    19. Underwater Safety Devices
    20. Original Article
    21. Magnetic Taconite
    22. Original Article
    23. Books and Teaching Aids Received
    24. Book Vignettes
    25. Poison Bite Precautions Can Save Lives
    26. Book Reviews
    1. The Use of Retesting as a Teaching Device in an Elementary Algebra Course (pages 725–729)

      Marc D. Glucksman

      Article first published online: 17 MAR 2010 | DOI: 10.1111/j.1949-8594.1973.tb09156.x

  8. Energy Crisis

    1. Top of page
    2. Editor's Page
    3. Pollen and Weather
    4. Original Article
    5. Possible Cause of Spinal Bifida
    6. Original Article
    7. Weather Prediction
    8. Original Article
    9. Energy Crisis
    10. Original Article
    11. Radio-Imaging Used to Detect Transplant Rejection, Disease
    12. Original Article
    13. Lung Diseases
    14. Original Article
    15. Extraction of Minerals
    16. Original Article
    17. Make Plans now to Attend
    18. Original Article
    19. Underwater Safety Devices
    20. Original Article
    21. Magnetic Taconite
    22. Original Article
    23. Books and Teaching Aids Received
    24. Book Vignettes
    25. Poison Bite Precautions Can Save Lives
    26. Book Reviews
    1. ENERGY CRISIS (page 729)

      Article first published online: 17 MAR 2010 | DOI: 10.1111/j.1949-8594.1973.tb09157.x

  9. Original Article

    1. Top of page
    2. Editor's Page
    3. Pollen and Weather
    4. Original Article
    5. Possible Cause of Spinal Bifida
    6. Original Article
    7. Weather Prediction
    8. Original Article
    9. Energy Crisis
    10. Original Article
    11. Radio-Imaging Used to Detect Transplant Rejection, Disease
    12. Original Article
    13. Lung Diseases
    14. Original Article
    15. Extraction of Minerals
    16. Original Article
    17. Make Plans now to Attend
    18. Original Article
    19. Underwater Safety Devices
    20. Original Article
    21. Magnetic Taconite
    22. Original Article
    23. Books and Teaching Aids Received
    24. Book Vignettes
    25. Poison Bite Precautions Can Save Lives
    26. Book Reviews
    1. Criterion Referenced Assessment and Its Classroom Uses as Viewed by Teachers (pages 730–734)

      Priscilla Jo Eisner

      Article first published online: 17 MAR 2010 | DOI: 10.1111/j.1949-8594.1973.tb09158.x

  10. Radio-Imaging Used to Detect Transplant Rejection, Disease

    1. Top of page
    2. Editor's Page
    3. Pollen and Weather
    4. Original Article
    5. Possible Cause of Spinal Bifida
    6. Original Article
    7. Weather Prediction
    8. Original Article
    9. Energy Crisis
    10. Original Article
    11. Radio-Imaging Used to Detect Transplant Rejection, Disease
    12. Original Article
    13. Lung Diseases
    14. Original Article
    15. Extraction of Minerals
    16. Original Article
    17. Make Plans now to Attend
    18. Original Article
    19. Underwater Safety Devices
    20. Original Article
    21. Magnetic Taconite
    22. Original Article
    23. Books and Teaching Aids Received
    24. Book Vignettes
    25. Poison Bite Precautions Can Save Lives
    26. Book Reviews
    1. RADIO-IMAGING USED TO DETECT TRANSPLANT REJECTION, DISEASE (page 734)

      Article first published online: 17 MAR 2010 | DOI: 10.1111/j.1949-8594.1973.tb09159.x

  11. Original Article

    1. Top of page
    2. Editor's Page
    3. Pollen and Weather
    4. Original Article
    5. Possible Cause of Spinal Bifida
    6. Original Article
    7. Weather Prediction
    8. Original Article
    9. Energy Crisis
    10. Original Article
    11. Radio-Imaging Used to Detect Transplant Rejection, Disease
    12. Original Article
    13. Lung Diseases
    14. Original Article
    15. Extraction of Minerals
    16. Original Article
    17. Make Plans now to Attend
    18. Original Article
    19. Underwater Safety Devices
    20. Original Article
    21. Magnetic Taconite
    22. Original Article
    23. Books and Teaching Aids Received
    24. Book Vignettes
    25. Poison Bite Precautions Can Save Lives
    26. Book Reviews
    1. How to Develop and Use Audio-Tutorial Instruction in Secondary-School Science (pages 735–742)

      John W. Butzow and Roland Pare

      Article first published online: 17 MAR 2010 | DOI: 10.1111/j.1949-8594.1973.tb09160.x

  12. Lung Diseases

    1. Top of page
    2. Editor's Page
    3. Pollen and Weather
    4. Original Article
    5. Possible Cause of Spinal Bifida
    6. Original Article
    7. Weather Prediction
    8. Original Article
    9. Energy Crisis
    10. Original Article
    11. Radio-Imaging Used to Detect Transplant Rejection, Disease
    12. Original Article
    13. Lung Diseases
    14. Original Article
    15. Extraction of Minerals
    16. Original Article
    17. Make Plans now to Attend
    18. Original Article
    19. Underwater Safety Devices
    20. Original Article
    21. Magnetic Taconite
    22. Original Article
    23. Books and Teaching Aids Received
    24. Book Vignettes
    25. Poison Bite Precautions Can Save Lives
    26. Book Reviews
    1. LUNG DISEASES (page 742)

      Article first published online: 17 MAR 2010 | DOI: 10.1111/j.1949-8594.1973.tb09161.x

  13. Original Article

    1. Top of page
    2. Editor's Page
    3. Pollen and Weather
    4. Original Article
    5. Possible Cause of Spinal Bifida
    6. Original Article
    7. Weather Prediction
    8. Original Article
    9. Energy Crisis
    10. Original Article
    11. Radio-Imaging Used to Detect Transplant Rejection, Disease
    12. Original Article
    13. Lung Diseases
    14. Original Article
    15. Extraction of Minerals
    16. Original Article
    17. Make Plans now to Attend
    18. Original Article
    19. Underwater Safety Devices
    20. Original Article
    21. Magnetic Taconite
    22. Original Article
    23. Books and Teaching Aids Received
    24. Book Vignettes
    25. Poison Bite Precautions Can Save Lives
    26. Book Reviews
    1. Adopting a Textbook, or: Research Can Help! (pages 743–746)

      Alice E. Klein

      Article first published online: 17 MAR 2010 | DOI: 10.1111/j.1949-8594.1973.tb09162.x

  14. Extraction of Minerals

    1. Top of page
    2. Editor's Page
    3. Pollen and Weather
    4. Original Article
    5. Possible Cause of Spinal Bifida
    6. Original Article
    7. Weather Prediction
    8. Original Article
    9. Energy Crisis
    10. Original Article
    11. Radio-Imaging Used to Detect Transplant Rejection, Disease
    12. Original Article
    13. Lung Diseases
    14. Original Article
    15. Extraction of Minerals
    16. Original Article
    17. Make Plans now to Attend
    18. Original Article
    19. Underwater Safety Devices
    20. Original Article
    21. Magnetic Taconite
    22. Original Article
    23. Books and Teaching Aids Received
    24. Book Vignettes
    25. Poison Bite Precautions Can Save Lives
    26. Book Reviews
    1. EXTRACTION OF MINERALS (page 746)

      Article first published online: 17 MAR 2010 | DOI: 10.1111/j.1949-8594.1973.tb09163.x

  15. Original Article

    1. Top of page
    2. Editor's Page
    3. Pollen and Weather
    4. Original Article
    5. Possible Cause of Spinal Bifida
    6. Original Article
    7. Weather Prediction
    8. Original Article
    9. Energy Crisis
    10. Original Article
    11. Radio-Imaging Used to Detect Transplant Rejection, Disease
    12. Original Article
    13. Lung Diseases
    14. Original Article
    15. Extraction of Minerals
    16. Original Article
    17. Make Plans now to Attend
    18. Original Article
    19. Underwater Safety Devices
    20. Original Article
    21. Magnetic Taconite
    22. Original Article
    23. Books and Teaching Aids Received
    24. Book Vignettes
    25. Poison Bite Precautions Can Save Lives
    26. Book Reviews
    1. An Examination of Readability Levels for Selected Basic Science Texts (pages 747–758)

      Charles D. Gilbert

      Article first published online: 17 MAR 2010 | DOI: 10.1111/j.1949-8594.1973.tb09164.x

  16. Make Plans now to Attend

    1. Top of page
    2. Editor's Page
    3. Pollen and Weather
    4. Original Article
    5. Possible Cause of Spinal Bifida
    6. Original Article
    7. Weather Prediction
    8. Original Article
    9. Energy Crisis
    10. Original Article
    11. Radio-Imaging Used to Detect Transplant Rejection, Disease
    12. Original Article
    13. Lung Diseases
    14. Original Article
    15. Extraction of Minerals
    16. Original Article
    17. Make Plans now to Attend
    18. Original Article
    19. Underwater Safety Devices
    20. Original Article
    21. Magnetic Taconite
    22. Original Article
    23. Books and Teaching Aids Received
    24. Book Vignettes
    25. Poison Bite Precautions Can Save Lives
    26. Book Reviews
    1. MAKE PLANS NOW TO ATTEND THE 1974 CONVENTION NOV. 7–9, CINCINNATI, OHIO (page 758)

      Article first published online: 17 MAR 2010 | DOI: 10.1111/j.1949-8594.1973.tb09165.x

  17. Original Article

    1. Top of page
    2. Editor's Page
    3. Pollen and Weather
    4. Original Article
    5. Possible Cause of Spinal Bifida
    6. Original Article
    7. Weather Prediction
    8. Original Article
    9. Energy Crisis
    10. Original Article
    11. Radio-Imaging Used to Detect Transplant Rejection, Disease
    12. Original Article
    13. Lung Diseases
    14. Original Article
    15. Extraction of Minerals
    16. Original Article
    17. Make Plans now to Attend
    18. Original Article
    19. Underwater Safety Devices
    20. Original Article
    21. Magnetic Taconite
    22. Original Article
    23. Books and Teaching Aids Received
    24. Book Vignettes
    25. Poison Bite Precautions Can Save Lives
    26. Book Reviews
    1. A Strategy for Evaluating the NSF Comprehensive Program for Teacher Education (pages 759–767)

      Wayne W. Welch and Arlen R. Gullickson

      Article first published online: 17 MAR 2010 | DOI: 10.1111/j.1949-8594.1973.tb09166.x

  18. Underwater Safety Devices

    1. Top of page
    2. Editor's Page
    3. Pollen and Weather
    4. Original Article
    5. Possible Cause of Spinal Bifida
    6. Original Article
    7. Weather Prediction
    8. Original Article
    9. Energy Crisis
    10. Original Article
    11. Radio-Imaging Used to Detect Transplant Rejection, Disease
    12. Original Article
    13. Lung Diseases
    14. Original Article
    15. Extraction of Minerals
    16. Original Article
    17. Make Plans now to Attend
    18. Original Article
    19. Underwater Safety Devices
    20. Original Article
    21. Magnetic Taconite
    22. Original Article
    23. Books and Teaching Aids Received
    24. Book Vignettes
    25. Poison Bite Precautions Can Save Lives
    26. Book Reviews
    1. UNDERWATER SAFETY DEVICES (page 767)

      Article first published online: 17 MAR 2010 | DOI: 10.1111/j.1949-8594.1973.tb09167.x

  19. Original Article

    1. Top of page
    2. Editor's Page
    3. Pollen and Weather
    4. Original Article
    5. Possible Cause of Spinal Bifida
    6. Original Article
    7. Weather Prediction
    8. Original Article
    9. Energy Crisis
    10. Original Article
    11. Radio-Imaging Used to Detect Transplant Rejection, Disease
    12. Original Article
    13. Lung Diseases
    14. Original Article
    15. Extraction of Minerals
    16. Original Article
    17. Make Plans now to Attend
    18. Original Article
    19. Underwater Safety Devices
    20. Original Article
    21. Magnetic Taconite
    22. Original Article
    23. Books and Teaching Aids Received
    24. Book Vignettes
    25. Poison Bite Precautions Can Save Lives
    26. Book Reviews
    1. Influence of SAPA on Kindergarten Children's Use of Logic in Problem Solving (pages 768–771)

      Jerry B. Ayers and Mary N. Ayers

      Article first published online: 17 MAR 2010 | DOI: 10.1111/j.1949-8594.1973.tb09168.x

  20. Magnetic Taconite

    1. Top of page
    2. Editor's Page
    3. Pollen and Weather
    4. Original Article
    5. Possible Cause of Spinal Bifida
    6. Original Article
    7. Weather Prediction
    8. Original Article
    9. Energy Crisis
    10. Original Article
    11. Radio-Imaging Used to Detect Transplant Rejection, Disease
    12. Original Article
    13. Lung Diseases
    14. Original Article
    15. Extraction of Minerals
    16. Original Article
    17. Make Plans now to Attend
    18. Original Article
    19. Underwater Safety Devices
    20. Original Article
    21. Magnetic Taconite
    22. Original Article
    23. Books and Teaching Aids Received
    24. Book Vignettes
    25. Poison Bite Precautions Can Save Lives
    26. Book Reviews
    1. MAGNETIC TACONITE MAY BE MINED SOON WITH AID OF UW-MADISON TECHNIQUE (page 771)

      Article first published online: 17 MAR 2010 | DOI: 10.1111/j.1949-8594.1973.tb09169.x

  21. Original Article

    1. Top of page
    2. Editor's Page
    3. Pollen and Weather
    4. Original Article
    5. Possible Cause of Spinal Bifida
    6. Original Article
    7. Weather Prediction
    8. Original Article
    9. Energy Crisis
    10. Original Article
    11. Radio-Imaging Used to Detect Transplant Rejection, Disease
    12. Original Article
    13. Lung Diseases
    14. Original Article
    15. Extraction of Minerals
    16. Original Article
    17. Make Plans now to Attend
    18. Original Article
    19. Underwater Safety Devices
    20. Original Article
    21. Magnetic Taconite
    22. Original Article
    23. Books and Teaching Aids Received
    24. Book Vignettes
    25. Poison Bite Precautions Can Save Lives
    26. Book Reviews
    1. Scientific Literacy and School Characteristics (pages 772–782)

      John B. Leake and Charles O. Hinerman

      Article first published online: 17 MAR 2010 | DOI: 10.1111/j.1949-8594.1973.tb09170.x

    2. Problem Department (pages 783–787)

      Margaret F. Willerding

      Article first published online: 17 MAR 2010 | DOI: 10.1111/j.1949-8594.1973.tb09171.x

  22. Books and Teaching Aids Received

    1. Top of page
    2. Editor's Page
    3. Pollen and Weather
    4. Original Article
    5. Possible Cause of Spinal Bifida
    6. Original Article
    7. Weather Prediction
    8. Original Article
    9. Energy Crisis
    10. Original Article
    11. Radio-Imaging Used to Detect Transplant Rejection, Disease
    12. Original Article
    13. Lung Diseases
    14. Original Article
    15. Extraction of Minerals
    16. Original Article
    17. Make Plans now to Attend
    18. Original Article
    19. Underwater Safety Devices
    20. Original Article
    21. Magnetic Taconite
    22. Original Article
    23. Books and Teaching Aids Received
    24. Book Vignettes
    25. Poison Bite Precautions Can Save Lives
    26. Book Reviews
    1. Books and Teaching Aids Received (pages 788–789)

      Article first published online: 17 MAR 2010 | DOI: 10.1111/j.1949-8594.1973.tb09172.x

  23. Book Vignettes

    1. Top of page
    2. Editor's Page
    3. Pollen and Weather
    4. Original Article
    5. Possible Cause of Spinal Bifida
    6. Original Article
    7. Weather Prediction
    8. Original Article
    9. Energy Crisis
    10. Original Article
    11. Radio-Imaging Used to Detect Transplant Rejection, Disease
    12. Original Article
    13. Lung Diseases
    14. Original Article
    15. Extraction of Minerals
    16. Original Article
    17. Make Plans now to Attend
    18. Original Article
    19. Underwater Safety Devices
    20. Original Article
    21. Magnetic Taconite
    22. Original Article
    23. Books and Teaching Aids Received
    24. Book Vignettes
    25. Poison Bite Precautions Can Save Lives
    26. Book Reviews
    1. Book Vignettes (pages 790–791)

      Article first published online: 17 MAR 2010 | DOI: 10.1111/j.1949-8594.1973.tb09173.x

  24. Poison Bite Precautions Can Save Lives

    1. Top of page
    2. Editor's Page
    3. Pollen and Weather
    4. Original Article
    5. Possible Cause of Spinal Bifida
    6. Original Article
    7. Weather Prediction
    8. Original Article
    9. Energy Crisis
    10. Original Article
    11. Radio-Imaging Used to Detect Transplant Rejection, Disease
    12. Original Article
    13. Lung Diseases
    14. Original Article
    15. Extraction of Minerals
    16. Original Article
    17. Make Plans now to Attend
    18. Original Article
    19. Underwater Safety Devices
    20. Original Article
    21. Magnetic Taconite
    22. Original Article
    23. Books and Teaching Aids Received
    24. Book Vignettes
    25. Poison Bite Precautions Can Save Lives
    26. Book Reviews
    1. POISON BITE PRECAUTIONS CAN SAVE LIVES (page 791)

      Article first published online: 17 MAR 2010 | DOI: 10.1111/j.1949-8594.1973.tb09174.x

  25. Book Reviews

    1. Top of page
    2. Editor's Page
    3. Pollen and Weather
    4. Original Article
    5. Possible Cause of Spinal Bifida
    6. Original Article
    7. Weather Prediction
    8. Original Article
    9. Energy Crisis
    10. Original Article
    11. Radio-Imaging Used to Detect Transplant Rejection, Disease
    12. Original Article
    13. Lung Diseases
    14. Original Article
    15. Extraction of Minerals
    16. Original Article
    17. Make Plans now to Attend
    18. Original Article
    19. Underwater Safety Devices
    20. Original Article
    21. Magnetic Taconite
    22. Original Article
    23. Books and Teaching Aids Received
    24. Book Vignettes
    25. Poison Bite Precautions Can Save Lives
    26. Book Reviews
    1. Book Reviews (pages 792–793)

      Article first published online: 17 MAR 2010 | DOI: 10.1111/j.1949-8594.1973.tb09175.x

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