Hickman, Cleveland P. 1896-1978. A field manual of animal ecology and natural history. - Minneapolis, Burgess Pub. Co., c1955. - 125 l. 21 cm. LCCN: 55004694 Subjects--Topical Terms: Animal ecology. LC Class. No.: QH541 / .H5 Dewey Class. No.: 591.5 591.5