Travers, Robert M W <br/><br/>
Introduction to educational research 

 - 4th ed. 
 - New York  Macmillan publishing co., inc.  1978 
 - xiv, 446 p.; 23cm. 
<br/><br/><label>ISBN: </label>24213705 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educational research