Varley, G. C. Insect population ecology: an analytical approach [by] G. C. Varley, G. R. Gradwell, M. P. Hassell. - Oxford, Blackwell Scientific, 1973. - x, 212 p. illus. Distributed in the U.S.A. by University of California Press, Berkeley. Includes index. ISBN: 0632080507 LCCN: 74180757 Nat. Bib. No.: GB74-06307 Subjects--Topical Terms: Insect populations.Insects--Ecology.Insetos--ecologia LC Class. No.: QL496.15 / .V37 1973 Dewey Class. No.: 591.55