Osborn, Henry Fairfield, 1857-1935.2020-05-072020-05-071921-05http://digitallibrary.amnh.org/handle/2246/71861921 edition "Reprinted with slight changes from Natural history, the journal of the American museum of natural history, for May-June, 1920, pages 228-246". Third edition, c1925 was revised and enlarged and edited by William K. Gregory.en-USAmerican Museum of Natural History. Hall of the Age of Man.Human evolution -- Exhibitions.Prehistoric peoples -- Exhibitions.Other