Helton, Floyd F. <br/><br/>
Introducing mathematics / 
Floyd F. Helton. 
 - 2nd ed. 
 - New York,   Wiley ;  c 1966. 
 - xv, 396 p. :  ill. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliography : p. 377-396 
<br/><br/>333  333 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathmatics.
<br/><br/><label>Dewey Class. No.: </label>510 / H35i