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REFERENCES

  • Andrew, R. (1970). The Cambridge pollen reference collection. Studies in the Vegetational History of the British Isles (Ed. by D.Walker and R. G.West). University Press. Cambridge .
  • Andrew, R. (1971). Exine pattern in the pollen of British species of Tilia. New Phytol., 70, 683.
  • Angold, R. E. (1968). The ontogeny and fine structure of the pollen grain Endymion nou-scriptus. Rev. Palaeobot. Palynol., 3, 205.
  • Beug, H. J. (1971). Leitfaden der Pollenbestimmung für Mittcleuropa und angrenzende Gebiete. Teile II/III. Fischer-Verlag, Stuttgart .
  • Cerceau, M.-T., Hideux, M., Marceau, L. & Roland, F. (1970). Cassure du pollen par les ultrasons pour l'étude structurale de l'exine au microscope electronique á balayage. C.R. hebd. Séanc. Acad. Sci., Paris, 270, 66.
  • Chambers, T. C. & Godwin, H. (1961). The fine structure of the pollen wall of Tilia platyphyllos. New Phytol., 60, 393.
  • Echlin, P. & Godwin, H. (1969). The ultrastructure and ontogeny of pollen in Helleborus foetidus L. III. The formation of the pollen grain wall. J. Cell Sci., 5, 459.
  • Erdtman, G. (1952). Pollen Morphology and Plant Taxonomy, Vol. I. Almquist & Wiksell, Stockholm .
  • Faegri, K. & Iversen, J. (1964). Textbook of Pollen Analysis. Munksgaard, Copenhagen .
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  • Godwin, H. (1968). The origin of the exine. New Phytol., 67, 667.
  • Heslop-Harrison, J. (1968). Pollen wall development. Science, N.Y., 161, 230.
  • Knox, R. B. & Heslop-Harrison, J. (1970). Pollen-wall proteins: localization and enzymic activity. J. Cell Sci., 6, 1.