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martyn e obbard
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Polar Bears: Proceedings of the 15th Working Meeting of the IUCN/SSC Polar Bear Specialist Group, Copenhagen, Denmark, 29 June-3 July 2009 (Occasional Paper of the Iucn Species Survival Commission)
Martyn E. Obbard, Gregory W. Thiemann, Elizabeth Peacock, Terry D. DeBruyn · World Conservation Union
235 sayfa · 2010
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