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keyword: Animal behavior – 38 free books.
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William J. (William Joseph) Long
Van den Noordpool naar den Aequator: Blikken in het groote rijk der schepping
Alfred Edmund Brehm
Thomas G. (Thomas George) Gentry
Cassell's Natural History, Vol. 3 (of 6)
P. Martin (Peter Martin) Duncan (editor)
Stories about Animals: with Pictures to Match
Francis C. (Francis Channing) Woodworth
William J. (William Joseph) Long