Werner, Heinz. <br/><br/>
Comparative psychology of mental development  /    
Heinz Werner. 
 - Rev. ed. 
 - New York :   International Universities Press,   1948 , repr. 1957 . 
 - xii, 564 p. :    illus. ;    22 cm. 
<br/><br/>Includes bibliographical references (p. 507-555) and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Psychology, Comparative--------
<br/><br/><label>Dewey Class. No.: </label>156 WER