Precalculus : functions and graphs / 
Munem, M.A. 
 - 5th ed. 
 - New York :  Worth Publishers ,Inc.,  c1990 
 - xii,534pages :  ill. ;  24cm. 
<br/><br/><label>ISBN: </label>0 891 418 0 
<br/><br/><label>Subjects--Topical Terms: </label>--mathematics
<br/><br/><label>Dewey Class. No.: </label>515 MUN