Differentiation :  studies of development / 
H. A. Witkin . . . [et al. ] 
 - New York :  John Wiley,  c1962 
 - 418 p. :  ill. ;  23 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label> USD 7.95 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Genetic psychology
<br/><br/><label>Dewey Class. No.: </label>136