Willoughby, Stephen S. <br/><br/>
Contemporary teaching of secondary school mathematics / 
Stephen S. Willoughby 
 - London :  John Wiley ,  c1967 
 - vii, 430 p. :  fig. ;  23 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label> USD 7.50 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Study and teaching (Secondary)
<br/><br/><label>Dewey Class. No.: </label>510.712