File:The study of animal life (1906) (14770062684).jpg - Wikimedia
The Illustrated Encyclopedia of Animal Life, Vol. 1: Mammals * OF THE NEW ILLUSTRATED ANIMAL KINGDOM 1961: Drimmer, Frederick: : Books
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The Animal Book: David Burnie: 9781409323495: : Books
Animal - Wikipedia
File:Evolution and animal life; an elementary discussion of facts, processes, laws and theories relating to the life and evolution of animals (1907) (14773037152).jpg - Wikimedia Commons
File:The chain of life in geological time (microform) - a sketch of the origin and succession of animals and plants (1880) (20612252475).jpg - Wikimedia Commons
File:Animal studies (1903) (18011661310).jpg - Wikimedia Commons
Animal - Wikipedia
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File:Image from page 216 of Brehm's Life of animals a complete natural history for popular home instruction and for the use of schools. Mammalia (1896) (20387042836).jpg - Wikimedia Commons