Miles, Phyllis Mary. Tropical freshwater ecology, by Phyllis M. Miles, H. B. Miles and V. E. Graham. Illustrated by V. E. Graham. - [London] : Hulton Educational Publications, [1970] - 136 p. : illus. ; 22 cm. - Hulton's biological field studies . Bibliography: p. [132] ISBN: 0717505235 LCCN: 79-512158 Subjects--Topical Terms: Freshwater ecology.--Tropics.------Ecology --Tropics.------ Dewey Class. No.: 574.52 MIL