Van Dalen, Deobold B.,  1911- <br/><br/>
Understanding educational research :  an introduction / 
Deobold B. Van Dalen 
 - 4th ed. 
 - New York :  McGraw-Hill,  1979 
 - xii, 547 p. :  ill. ;  24 cm. 
<br/><br/> Includes indexes 
<br/><br/>Bibliography: p. 531-537 
<br/><br/><label>ISBN: </label>0070668833 :  USD 16.00 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educational change--Case studies<br/>Education--Research
<br/><br/><label>Dewey Class. No.: </label>370.072