Stephens, David W., 1955- Foraging theory / David W. Stephens and John R. Krebs. - Princeton, N.J. : Princeton University Press, c1986. - xiv, 247 p. : ill. ; 25 cm. - Monographs in behavior and ecology . Includes bibliographical references p. ([217]-237) and index ISBN: 0691084416 (alk. paper) : 0691084424 (pbk.) : LCCN: 86-042845 Subjects--Topical Terms: Animals-- Food. Dewey Class. No.: 591.5/3