Van Dalen, Deobold B.,  1911- <br/><br/>
Understanding educational research :  an introduction / 
[by] Deobold B. Van Dalen. 
 - 3d ed. 
 - New York :  McGraw-Hill,  1973 
 - ix, 532 p. :  illus. ;  24 cm. 
<br/><br/>Bibliography: p. 507-515. 
<br/><br/><label>ISBN: </label>0070668825 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education--Research.
<br/><br/><label>Dewey Class. No.: </label>370.78