Popham, W. James. <br/><br/>
Educational statistics :  use and interpretation / 
W. James Popham. 
 - New York :  Harper & Row,  1967 
 - ix, 629 p. ;  21 cm. 
<br/><br/>Includes index. 
<br/><br/> Open access. 
<br/><br/><label>LCCN: </label>6711658  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educational statistics.