00902cam a2200289 4500 1519377 BD-DhUL 20161117182815.0 750812s1949 enk b 000 0 eng 49003989 (OCoLC)ocm01541264 (NNC)1519377 DLC BD-DhUL SER OCL 591.51 h \LOK\ Bierens de Haan, J. A. (Johan Abraham), 1883-1958. Animal psychology : its nature and its problems / New York : Hutchinson's University Library, 1949 160 p. : 19 cm. Hutchinson's university library. Psychology ; no. 15 Bibliography: p. 155-156. Psychology, Comparative. Animal intelligence. Hutchinson's university library. Psychology ; no. 15. AUTH ddc BK 125533 125533