Wallen, Norman E. , <br/><br/>
Educational research :  a guide to the process / 
Norman E Wallen, Jack R Fraenkel. 
 - xv, 363 pages :  illustrations ;  28 cm. 
<br/><br/><label>ISBN: </label>0070679452 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educational research.
<br/><br/><label>LC Class. No.: </label>LB1028   / .W35 1991