"Arctic regions" . . "Noordpoolgebied." . . "isbjørne" . . "Artenschutz." . . "Arktis" . . "global opvarmning" . . . . "Ours blanc." . . "truede dyr" . . "IJsberen." . . "Ökologie." . . "klimaændringer" . . "Stirling, Ian" . . . . . . . . . "Polar bears : the natural history of a threatened species" . "Polar bears : the natural history of a threatened species"@en . . . . . . "Pictorial works" . "Includes chapters on polar bear biology, how to study them, conflicts between polar bears and man, conservation and environmental concerns, and the polar bears of Churchill. Profusely illustrated with colour photographs. Appendix includes texts of management agreements." . "Includes chapters on polar bear biology, how to study them, conflicts between polar bears and man, conservation and environmental concerns, and the polar bears of Churchill. Profusely illustrated with colour photographs. Appendix includes texts of management agreements."@en . . "Polar bears" . "Polar bears"@en . . "Comprehensive study of the polar bear: their evolution, life history, behavior, how they are researched, and the current threat to their very existence." . . . . . . . . . . . . . . . . . . . . . . . . . . "Bildband" . . . . . "Polar Bears The Natural History of a Threatened Species"@en . . . . . . . . "Ours blanc Ouvrages illustrés." . . "isbjørn" . . "Eisbär." . . "polarområder" . .