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United Nations Environment Programme ,  [Handbook for the International Treaties for the Protection of the Ozone Layer Sixth Edition: The Vienna Convention (1985); The Montreal Protocol (1987)] ,  Handbook for the International Treaties for the Protection of the Ozone Layer Sixth Edition: The Vienna Convention (1985); The Montreal Protocol (1987)

United Nations Environment Programme ,  [Manual for the refrigeration and air-conditioning technicians and engineers: post phase-out period of CFCs and beginning of phase-out of HCFCs] ,  Manual for the refrigeration and air-conditioning technicians and engineers: post phase-out period of CFCs and beginning of phase-out of HCFCs

United Nations Environment Programme ,  [Saving the ozone layer: guidelines for United Nations Offices] ,  Saving the ozone layer: guidelines for United Nations Offices

World Health Organization ,  [WHO air quality guidelines for particulate matter, ozone, nitrogen dioxide and sulfur dioxide: Global update 2005: Summary of risk assessment] ,  WHO air quality guidelines for particulate matter, ozone, nitrogen dioxide and sulfur dioxide: Global update 2005: Summary of risk assessment

United Nations Environment Programme ,  [Recovery and recycling systems guidelines: phasing out ODS in developing countries, refrigeration sector] ,  Recovery and recycling systems guidelines: phasing out ODS in developing countries, refrigeration sector

United Nations Environment Programme ,  [Making good decisions: how to use UNEP DTIE's OzonAction clearinghouse] ,  Making good decisions: how to use UNEP DTIE's OzonAction clearinghouse