• Bryson RA, Lowry WP. 1955. Synoptic climatology of the Arizona summer precipitation singularity. Bulletin of the American Meteorological Society 36: 329339.
  • Carleton AM. 1986. Synoptic-dynamic character of ‘bursts’ and ‘breaks’ in the south-west US summer precipitation singularity. Journal of Climatology 6: 605623.
  • Chalk L. 1951. Water and the growth of wood of Douglas fir. Quarterly Journal of Forestry 45: 242337.
  • Clark LA, Pregibon D. 1992 Tree-based models. In Statistical Models in S, ChambersM, HastieTJ (eds).. Wadsworth and Brooks/Cole Advanced Books and Software: Pacific Grove, CA; 377419.
  • Cleaveland MK. 1983 X-Ray densitometric measurement of climatic influence on the intra-annual characteristics of Southwestern semiarid conifer tree rings, PhD Dissertation. University of Arizona, Tucson.
  • Cook ER, Peters K. 1981. The smoothing spline: a new approach to standardizing forest interior tree-ring width series for dendroclimatic studies. Tree-Ring Bulletin 41: 4553.
  • Cook ER, Meko DM, Stahle DW, Cleaveland MK. 1999. Drought reconstructions for the continental United States. Journal of Climate 12: 11451162.
  • Dawdy DR, Matalas NC. 1964 Statistical and probability analysis of hydrologic data, part III: analysis of variance, covariance and time series. In Handbook of Applied Hydrology, A Compendium of Water-Resources Technology, ChowVT (ed.).. McGraw-Hill Book Company: New York; 8.688.90.
  • Douglass AE. 1919 Climatic cycles and tree-growth: a study of the annual rings of trees in relation to climate and solar activity. Publication 289, Carnegie Institution of Washington.
  • Higgins RW, Mo KC, Yao Y. 1998. Interannual variability of the US summer precipitation regime with emphasis on the southwestern monsoon. Journal of Climate 11: 25822606.
  • Hoadley B. 1990 Identifying Wood; Accurate Results with Simple Tools. The Taunton Press: Newtown, CT.
  • Jagels R, Telewski FW. 1990 Computer-aided image analysis of tree rings. In Methods of Dendrochronology, Applications in the Environmental Sciences, CookER, KairiukstisLA (eds).. Kluwer Academic Press: Boston; 7693.
  • Jones PD, Hulme M. 1996. Calculating regional climatic time series for temperature and precipitation: methods and illustrations. International Journal of Climatology 16: 361377.
  • Kozlowski TT, Pallardy SG. 1997 Physiology of Woody Plants (2nd Edn). Academic Press: San Diego.
  • Larson PR. 1969 Wood formation and the concept of wood quality. Bulletin No. 74, School of Forestry and Environmental Studies, Yale University: New Haven, CT.
  • Lodewick JE. 1930. Effect of certain climatic factors on the diameter growth of longleaf pine in western Florida. Journal of Agricultural Research 41: 349363.
  • Michaelsen J. 1987. Cross-validation in statistical climate forecast models. Journal of Climate and Applied Meteorology 26: 15891600.
  • Mitchell JM Jr, Dzerdzeevskii B, Flohn H, Hofmeyr WL, Lamb HH, Rao KN, Wallén CC. 1966 Climatic change. Technical Note No. 79, report of a working group of the Commission for Climatology. World Meteorological Organization No. 195 TP 100: Geneva, Switzerland.
  • Namias J. 1955. Some meteorological aspects of drought, with special reference to the summers of 1952–1954 over the United States. Monthly Weather Review 83: 199205.
  • Palmer WC. 1965 Meteorological Drought. Research Paper No. 45, US Weather Bureau, Department of Commerce.
  • Schulman E. 1942. Dendrochronology in pines of Arkansas. Ecology 23: 309318.
  • Sellers WD, Hill RH.. 1974 Arizona Climate, 1931–1972. The University of Arizona Press: Tucson, AZ.
  • Sheppard PR, Graumlich LJ, Conkey LE. 1996. Reflected-light image analysis of conifer tree rings for reconstructing climate. The Holocene 6: 6268.
  • Spurk M.. 1997. Dendroclimatological investigations on pine (Pinus sylvestris L.) growing at the planar-colline stage of Germany. Dendrochronologia 15: 5172.
  • Stokes MA., Smiley TL. 1968 An Introduction to Tree-Ring Dating. The University of Arizona Press: Tucson, AZ.
  • Wigley TML, Briffa KR, Jones PD. 1984. On the average value of correlated time series, with applications in dendroclimatology and hydrometeorology. Journal of Climate and Applied Meteorology 23: 201213.
  • WRCC. 2000 Page title: Western Regional Climate Center WWW Server. Accessed 3 December 2000. E-mail: