Sea Mammals of the World

di Bernard Stonehouse

1985 · 158 pagine · Penguin · ISBN 9780140070811

Trama

A condensed guide to the world's marine mammals, including polar bears, otters, seals, sea lions, walruses, sirenians, whales, porpoises and dolphins. An introductory chapter outlines the evolution of marine mammals, their adaptation to life in water, and their conservation.

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