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Review of: Estimating the Size of Animal Populations by J. Gordon Blower; Laurence M. Cook; James A. Bishop. George Allen and Unwin Ltd., London, U.K. 1981. 128 pp. $16.95.
Review of: Population Systems: A General Introduction. By Alan A. Berryman. Plenum Press, New York, N.Y. and London, U.K. 1981. xv, 222pp. $16.95 (cloth).
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