Polar bears : proceedings of the eighth Working Meeting of the IUCN/SSC Polar Bear Specialist Group, held at the Ministry of Environment, Oslo, Norway, 15-19 January 1981 1985
Conserving the natural heritage of Latin America and the Caribbean : the planning and management of protected areas in the neotropical realm = Conservar el patrimonio natural de América Latina y del Caribe : la planificación y administración de las ár 1981
Conserving Africa's natural heritage : the planning and management of protected areas in the afrotropical realm : proceedings of the 17th meeting of IUCN's Commission on National Parks and Protected Areas, Garoua, Cameroon, 17-23 November 1980 1981
Conservation, science and society : contribution to the first International Biosphere Reserve Congress, Minsk, Byelorussia, USSR, 26 September-2 October 1983 1984
Proceedings of the twenty-second Working Session, Commission on National Parks and Protected Areas, Victoria Falls, Zimbabwe, 22-27 May, 1983 1984
