Varley, G. C. (George Copley) Insect population ecology an analytical approach / by G.C. Varley, G.R. Gradwell, M.P. Hassell - Berkeley, Calif. University of California Press 1974 - x, 212p. ill. 24cm With answers Bibl.: p.179-191. - Index ISBN: 0520026675 LCCN: 73-089367 Subjects--Topical Terms: Insect populationsZoology--Ecology