Solbrig, Otto T. Principles and methods of plant biosystematics / Otto T. Solbrig - London : Macmillan, 1970 - xiii, 226 p. : ill., maps, ports. ; 24 cm. - The Macmillan biology series . Includes bibliographical references and index ISBN: USD 9.95 Subjects--Topical Terms: Plants--Classification Dewey Class. No.: 581