Borg, Walter R. <br/><br/>
Educational research  an introduction 
Walter R. Borg 
 - 5a 
 - xxi, 939 p. 
<br/><br/><label>ISBN: </label>0801303346 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educación--investigación
<br/><br/><label>Dewey Class. No.: </label>370.78  / BOR 1989