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Oystein Wiig
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Polar bears
IUCN/SSC Polar Bear Specialist Group. Working Meeting, Steven C. Amstrup, Oystein Wiig, Nicholas J. Steven, Erik W. Born, Scott Lunn Schliebe · IUCN--The World Conservation Union
155 sayfa · 1991
Congresses / Wildlife conservation / Polar bear / Rare mammals / Endangered species