Ruud, Warren L. <br/><br/>
Prelude to calculus / 
Warren L. Ruud and Terry L. Shell. 
 - Belmont, Calif. :  Wadsworth Pub.,  c1990. 
 - xiv, 719, 69 p. :  ill. (some col.) ;  25 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0534102905 (hbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics.