Mathematics teaching 
Kenneth J. Travers ... et al. 
 - New York  Harper & Row  1977 
 - x, 591 p. : ill. ; 25 cm. 
<br/><br/> includes index. 
<br/><br/>p. 548-583. 
<br/><br/><label>ISBN: </label>0060452331 
<br/><br/><label>LCCN: </label>76-054749 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Study and teaching