Hegnauer R Chemotaxonomie der pflanzen stuttgart - Birkhauser Verlag Basel 1969 - 506p. cm. - Chemische reihe; 20 . Standard No.: 49022 Source: Textual Subjects--Topical Terms: Chemotaxonomie Plant classificationBotany Dewey Class. No.: I:11:(E), 113K2.5