Lehmann, Irvin J ed. <br/><br/>
Educational research / 
edited by Irvin J Lehmann, and William A Mehrens 
 - New York :  Holt Rine hart,  1971. 
 - 460p. : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Research
<br/><br/><label>Dewey Class. No.: </label>370.78  / LEH.E