Gates, Frank C. 1887-1955. Field manual of plant ecology. - 1st ed. - New York, McGraw-Hill Book Co., 1949. - xv, 137 p. illus. 24 cm. - McGraw-Hill publications in the botanical sciences . Includes bibliographies. LCCN: agr49000418 Subjects--Topical Terms: Plant ecology. LC Class. No.: QK901 / .G3 Dewey Class. No.: 581.5