Sax, Gilbert. <br/><br/>
Foundations of educational research / 
Gilbert Sax. 
 - 2d ed. 
 - Englewood Cliffs, N.J. :  Prentice-Hall,  c1979. 
 - xiv, 434 p. :  ill. ;  24 cm. 
<br/><br/> First ed. published in 1968 under title: Empirical foundations of educational research. 
<br/><br/>Includes bibliographies and index. 
<br/><br/><label>ISBN: </label>0133293009 
<br/><br/><label>LCCN: </label>78014596  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education--Research.
<br/><br/><label>LC Class. No.: </label>LB1028  / .S233 1979 
<br/><br/><label>Dewey Class. No.: </label>370.72 SAX