Van Dalen, Deobold B.,  1911- <br/><br/>
Understanding educational research  an introduction 
Deobold B. Van Dalen 
 - 4th ed. 
 - New York  McGraw-Hill  c1979 
 - xii, 547 p.  ill.  24 cm. 
<br/><br/> Includes indexes 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education--Research
<br/><br/><label>Dewey Class. No.: </label>370  / .78