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
Polar bears : proceedings of the ninth Working Meeting of the IUCN/SSC Polar Bear Specialist Group held at Edmonton, Canada, 9-11 August 1985 1986
Polar bears : proceedings of the Technical Workshop of the IUCN Polar Bear Specialists Group, Grand Canyon, Arizona, 16-18 February 1983 1984
