Length of day in the climates of past geological eras and its possible effects upon changes in plant life
By: by H. A. Allard
Publisher: The Chronica Botanica Co.
Published: 1948
Place of publication: Waltham, Mass
Language: eng
Number of pages: 119
Notes: Reprinted from Vernalization and Photoperiodism -- A Symposium (LOTSYA -- A Biological Miscellany, edited by Frans Verdoorn, v. 1), no. 8, p. 101-119, 1948.

Includes bibliographical references (p. 119).