Flowering plants : evolution and classification of higher categories : symposium, Hamburg, September 8-12, 1976 / edited by K. Kubitzki - Wien, Austria : Springer-Verlag, 1977 - viii, 416 p. : ill. ; 23 cm. Includes bibliographical references and indexes ISBN: 0387814345 LCCN: 77-25200 Subjects--Topical Terms: Botany--Classification--CongressesPlants--Evolution--CongressesPhanerogams--Congresses