Clean air at work : new trends in assessment and measurement for the 1990s : the proceedings of an International Symposium held in Luxembourg, 9-13 September 1991, organised by the Commission of the European Communities, Health and Safety Directorate and the Community Bureau of Reference in collaboration with the Royal Society of Chemistry, Analytic Division, Automatic Methods Group (UK) ... [et al]. - Brown, R. H. (Royal Society of Chemistry, 1992)