Polar Bears by: Proceedings of the Eighth Working Meeting of the IUCN/SSC Polar Bear Specialist Group (8th : 1985 jan. 15-19 : Oslo, Norway Published: (1985)
Polar Bears by: Proceeding of the Ninth Working Meeting of the IUCN/SSC Polar Bear Specialist Group (9th : 1986 ago. 9-11 : Edmonton, Canada Published: (1986)