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By "Learned, Blanche W. "
Chimpanzee intelligence and its vocal expressions, by Robert M. Yerkes and Blanche W. Learned.
By: Yerkes, Robert Mearns, - Learned, Blanche W.
Publication info: Baltimore,The Williams & Wilkins Company,1925.
Contributed by: MBLWHOI Library, Woods Hole
BHL Collections: MBLWHOI Library, Woods Hole