Educational research :  Readings in focus / 
edited by Irvin J Lehmann, William A Mehrens. 
 - New York :  Holt, Rinehart and Winston Inc.,  c1971 
 - xiii, 460 p. ;  23 cm. 
<br/><br/><label>ISBN: </label>0030831407 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education --Research.
<br/><br/><label>Dewey Class. No.: </label>370.78   / EDU