METHODS FOR ASSESSING THE EFFECTS OF MIXTURES OF CHEMICALS-Report of IPCS Joint Symposium 6, SCOPE 30 and SGOMSEC 3 edited by: V. B. Vouk, G. C. Butler, A. C. Upton, D. V. Parke, S. C. Asher published by: J. Wiley and Sons, Chichester price; £99.00 ISBN 0 471 911232 PHEROMONES OF SOCIAL BEES, by John B. Free, London: Chapman & Hall 1987. £17.50 THE CONSERVATION OF ECOSYSTEMS AND SPECIES, by Gareth E. Jones, Croom Helm (1987), ISBN 0-7099-1463-6, 277 pp. £27.50 hbk; pbk-not available
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