Van Dalen, Deobold B., <br/><br/>
Understanding educational research :  an introduction / 
Deobold B. Van Dalen. 
 - New York :  McGraw-Hill,  c1979. 
 - xii, 547 p. :  ill.   24 cm. 
<br/><br/>Includes indexes and Bibliography: p. 531-537. 
<br/><br/><label>ISBN: </label>0070668833 : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education--Research.
<br/><br/><label>Universal Decimal Class. No.: </label>370.78