Bierens, J. A.  1883- <br/><br/>
Animal psychology, its nature and its problems / 
J. A. Bierens 
 - New York :  Hutchinson's University Library,  1949 
 - 160 p. ;  18 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Psychology, Comparative<br/>Animal intelligence
<br/><br/><label>Dewey Class. No.: </label>151.3