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Some Morphological and Anatomical Investigations on the Flowers of the Genus Potamogeton. Variation in Stone Cells in "seed" Coats of Different Species of the Genus Najas

Natalie (Whitford) Uhl

出版	Cornell Univ., 1943
URL	http://books.google.com.hk/books?id=vz1CAAAAYAAJ&hl=&source=gbs_api