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Polar bears : a complete guide to their biology and behavior /
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ISBN13: 9781421403052 (hardcover:alk.paper) ISBN10: 1421403056 ( hardcover : alk. paper) 1. Polar bear.2. Polar bear—Behavior. I. Title. QL737. C27D47 2012 599.786—dc23 2011021303 A catalog record for thisbookis available fromthe ...