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|All Authors / Contributors:||
James Morton Schopf
|Notes:||"The present study ... was begun in 1932 ... and most of the material was presented in June, 1937, as a dissertation for the degree of doctor of philosophy in botany at the University of Illinois. An abstract of the dissertation was published ... in 1937. Some additional material was collected and sectioned in 1938, and a few recent bibliographical references have been added."--Pref.|
|Description:||97 p. incl. illus., VI pl. on 3 l., diagrs. 27 cm.|
|Series Title:||Illinois biological monographs, vol. XIX, no. 4.|
|Responsibility:||with 86 figures, by James Morton Schopf ...|