File:Figure 43 01 02.jpg - Wikimedia Commons
Public and Private Life of Animals (1877) — The Public Domain Review
Animal - Wikipedia
File:Natural history of the animal kingdom for the use of young people - in three parts
National Museum of Natural History Vertebrate Zoology Libraries
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
File:Image from page 215 of Brehm's Life of animals a complete natural history for popular home instruction and for the use of schools. Mammalia (1896) (20225227630).jpg - Wikimedia Commons
The Illustrated Encyclopedia of Animal Life, Vol. 1: Mammals * OF THE NEW ILLUSTRATED ANIMAL KINGDOM 1961: Drimmer, Frederick: : Books
Animal - Wikipedia
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