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1

por Proceedings of the Eighth Working Meeting of the IUCN/SSC Polar Bear Specialist Group (8th : 1985 jan. 15-19 : Oslo, Norway
Publicado 1985

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2

por Proceeding of the Ninth Working Meeting of the IUCN/SSC Polar Bear Specialist Group (9th : 1986 ago. 9-11 : Edmonton, Canada
Publicado 1986

Libro

3

Publicado 1991

“...Working Meeting of the IUCN/SSC Polar Bear Specialist Group...”

Libro

4

Publicado 1986

“...Working Meeting of the IUCN/SSC Polar Bear Specialist Group, (9a. : 1985 : held at edmonion, Canada)...”

Libro