Sax, Gilbert. <br/><br/>
Empirical foundations of educational research / 
Gilbert Sax. 
 - Englewood Cliffs :  Prentice-Hall,  1968. 
 - xiii, 443 p. :  illus. ;  24 cm. 
<br/><br/> Published in 1979 under title: Foundations of educational research. 
<br/><br/>Includes bibliographical references. 
<br/><br/> Open access. 
<br/><br/><label>LCCN: </label>6810609  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education--Research.