'First published in "Proceedings of the Royal Society of London", series B, volume 197 (no.1126), pages 1-103' - title page verso.
Scientific aspects of nature conservation in Great Britain : a Royal Society discussion organized by J.E. Smith, A.R. Clapham and D.A. Ratcliffe, held on 10 June 1976. ISBN 0854030891. Published by Royal Society in 1977. Publication and catalogue information, links to buy online and reader comments.