Langer, Jonas. <br/><br/>
Theories of development / 
Jonas Langer. 
 - New York :  Holt, Rinehart and Winston,  c1969. 
 - xi, 191 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/>
<br/><br/><label>LCCN: </label>69013564  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Genetic psychology.
<br/><br/><label>Dewey Class. No.: </label>155  / LAT