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The mentality of apes / by Wolfgang Köhler ; Tr. from the 2d rev. ed. by Ella Winter. Köhler, Wolfgang, 1887-1967.
London : K. Paul, Trench, Trubner & co., ltd.; New York : Harcourt, Brace & company, inc., 1931.
viii, 336 p. : IX pl. (incl. front.) diagrs., 23 cm.