EUROPEAN COOPERATION ON ENVIRONMENTAL HEALTH ASPECTS OF THE CONTROL OF CHEMICALS-INTERIM DOCUMENT 9 540,529 TOXICOLOGY Toxicology of pesticides. Proceedings of a Seminar. Sofia, Bulgaria 31 August -12 September 1981. Copenhagen 1982 World Health Organization, Regional Office for Europe 8 s. VIII, nlb. 2, 288, il. European Cooperation on Environmental Health Aspects of the Control of Chemicals-Interim Document 9