The numbers of man and animals / Edited by J. B. Cragg and N. W. Pirie. Institute of Biology. Pirie, N. W. (Norman Wingate), 1907- joint author. Cragg, J. B., ed. Population. HB881 .I65 591.52 CRN "A record of the symposium held on 24 and 25 September 1954 by the Institute of Biology." Includes bibliographical references. Edinburgh : Oliver and Boyd, c1955. c1955. 1955 Text viii, 152 p. : eng