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United Nations Environment Programme ,  [Environmental Aspects of Nickel Production: Part I. Sulphide Pyrometallurgy and Nickel Refining - A Technical Review] ,  Environmental Aspects of Nickel Production: Part I. Sulphide Pyrometallurgy and Nickel Refining - A Technical Review

United Nations Environment Programme ,  [Environmental Aspects of Iron and Steel Production: A Technical Review] ,  Environmental Aspects of Iron and Steel Production: A Technical Review

United Nations Environment Programme ,  World Health Organization ,  [Assessment of Urban Air Quality] ,  Assessment of Urban Air Quality

United Nations Environment Programme ,  [UNEP-HEM / WHO / GEMS/AIR Workshops on Sampler Methodologies in Air Quality Monitoring: Availability, Applicability, and QA/QC Implications - I. Gaseous Species, II. Suspended Particulate Matter - UNEP/GEMS Report Series No.27] ,  UNEP-HEM / WHO / GEMS/AIR Workshops on Sampler Methodologies in Air Quality Monitoring: Availability, Applicability, and QA/QC Implications - I. Gaseous Species, II. Suspended Particulate Matter - UNEP/GEMS Report Series No.27