A Graphical Approach To Precaculus / 
Hornsby,John E. 
 - New York :  Harper Collins College Publishers,  c1996 
 - xxvi,908pages :  col. ;  26cm. 
<br/><br/><label>ISBN: </label>9 780673 999665 
<br/><br/><label>Subjects--Topical Terms: </label>--mathematics
<br/><br/><label>Dewey Class. No.: </label>515 HOR