This report contains the collective views of an international group of
experts and does not necessarily represent the decisions or the stated
policy of the United Nations Environment Programme, the International
Labour Organisation, or the World Health Organization.
Published under the joint sponsorship of
the United Nations Environment Programme,
the International Labour Organisation,
and the World Health Organization
First draft prepared by Dr. G. Rosner, Dr. H.P. König,
and Dr. D. Coenen-Stass, Fraunhofer Institute
of Toxicology and Aerosol Research, Germany