Helton, Floyd F. <br/><br/>
Precalculus mathematics  : a functions approach 

 - Dallas :   Foresman and Company Scott,  1983. 
 - xi,514p.  : ill.   ; 24cm.  
<br/><br/>Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics<br/>Functions
<br/><br/><label>LC Class. No.: </label>QA39.2.H4  1983