Werner, Heinz, <br/><br/>
Comparative psychology of mental development / 
by Heinz Werner and With a foreword by Gordon W. Allport. 
 - Rev. ed. 
 - New York :  Science Edition, Inc ,  1961 . 
 - xii, 564 p. :  illus.,   22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Psychology.<br/>Mental development
<br/><br/><label>Dewey Class. No.: </label>156  / WER N61C