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- Air quality guidelines in the european region : Report on two workshops - Copenhagen : WHO , 1991 - 66 s. (Protection against air pollution; No. 21) [1, currently available 1]
- Chapters, articles
book
- Impact on human health of air pollution in Europe : Report - Copenhagen : WHO , 1991 - 27 s. (Protection against air pollution; No. 21) [1, currently available 1]
- Chapters, articles
book
- Working group on assessment of risks to health from smog episodes : Summary report. 's Hertogenbosch, Netherlands 30 October - 2 November 1990 - Copenhagen : WHO , 1991 - 6 s. (Protection against air pollution; No. 21) [1, currently available 1]
- Chapters, articles
book
- Working group on indoor air quality: inorganic fibres and other particulate matter : Summary report. Kingston, Ontario (Canada) 24-28 July 1990 - Copenhagen : WHO , 1991 - 3 s. (Protection against air pollution; No. 21) [1, currently available 1]
- Chapters, articles
book