Plant ecology/ John E. Weaver ... and Frederic E. Clements ... Weaver, John E. (John Ernest), 1884-1966. Clements, Frederic E. (Frederic Edward), 1874-1945, joint author. Plant ecology. QK901 .W4 1938 581.5 WEP Includes bibliography: (p. 539-582) and index. London : McGraw-Hill Book Company, inc., c1938. c1938. 1938 Text xxii, 601 p. : eng McGraw-Hill publications in the botanical sciences