Sax, Gilbert <br/><br/>
Foundations of educational research / 
Gilbert Sax 
 - 2nd ed. 
 - Englewood Cliffs, N.J. :  Prentice-Hall,  1979 
 - 434 p ;  24 cm. 
<br/><br/> This is the second edition of a book formerly titled'Empirical foundations of educational research' 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>0133293009 
<br/><br/><label>LCCN: </label>78-14596 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educational research