Encyclopedia of educational research / 
editor in chief Harold E. Mitzel 
 - 5th ed. 
 - New York :  Free Press,  1982 
 - v. ;  28 cm. 
<br/><br/><label>ISBN: </label>0029004500 
<br/><br/><label>LCCN: </label>82-02332 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education--Dictionaries<br/>Education--Bibliography