Travers, Robert M. W.  1913. <br/><br/>
An introduction to educational research / 
Robert M. W. Travers. 
 - 4th ed. 
 - New York :  MacMillan,  1978. 
 - xiv, 446 p. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliography : p. 425-433 
<br/><br/><label>ISBN: </label>0024213705 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educational research.