"Published under the joint sponsorship of the United Nations Environment Programme, the International Labour Organisation, and the World Health Organization"--T.p. "A WHO Task Group on Environmental Health Criteria on Benzene met at the Frauhofer Institute of Toxicology and Aerosol Research, Hanover, Germany, from 2 to 6 December, 1991, the meeting being sponsored by the German Ministry of the Environment."--P. 10. Text in English with summaries in French and Spanish. "IPCS--International Programme on Chemical Safety"--Cover. "First draft prepared by Dr. E.E. McConnell." Includes bibliographical references (p. 120-143).