Johansen Donald Alexander Plant embryology:embryogeny of the spermatophyta - Waltham Chronica Botanica 1950 - xvi,305 - New Series of Plant Science Books; 24 . Includes references; Glossary 295-298p Standard No.: 58193 Source: Textual Subjects--Topical Terms: Botany Dewey Class. No.: I9B, J0;1 CS