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United Nations Environment Programme ,  World Health Organization ,  International Labour Organisation ,  [Lasers and Optical Radiation - Environmental Health Criteria 23] ,  Lasers and Optical Radiation - Environmental Health Criteria 23

United Nations Environment Programme ,  Caribbean Environment Programme ,  [Borrador Problemas Ambientasles Que Afectan El Medio Marino Y Costero En La Region Del Gran Caribe - Informe Técnico del PAC 19, Problemes ecologiques ayant un effet sur le milieu marin et cotier de la region des Caraibes - Rapport technique du PEC No 19] ,  [Evironmental Problems affecting the Coastal and Marine Environment in the Wider Caribbean Region - CEP Technical Report 19] ,  Evironmental Problems affecting the Coastal and Marine Environment in the Wider Caribbean Region - CEP Technical Report 19

United Nations Environment Programme ,  [Report of the Workshop on Chemical Hazards for African Countries, Nairobi, September 14-18, 1987] ,  Report of the Workshop on Chemical Hazards for African Countries, Nairobi, September 14-18, 1987