Dalen, Deobold B. Van <br/><br/>
Understanding educational research  : an introduction 

 - 4th ed. 
 - New York  ; Mcgraw-Hill  , 1962 
 - xii,546p. 
<br/><br/><label>ISBN: </label>0070668833   
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education<br/>Educational Research
<br/><br/><label>Dewey Class. No.: </label>370.1  / DAL