Reference:Preece1956a
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Verbatim text: Preece, S. J. 1956. A Cytotaxonomic Study of the Genus Zigadenus (Liliaceae). Ph.D. dissertation. State College of Washington [Washington State University].
Author: Preece, S.J.
Year: 1956
Title: A Cytotaxonomic Study of the Genus Zigadenus (Liliaceae)