Mussen, Paul Henry <br/><br/>
Handbook of research methods in child development / 
Contributors: Alfred L. Baldwin and others 
 - New York :  Wiley,  1960 
 - 1061 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliography 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Child psychology--Methodology<br/>Psychology--Research