Howes, Vernon E. <br/><br/>
Essentials of mathematics : precalculus , a programmed text / 
Vernon E Howes 
 - New York :  John Wiley and Sons,  1975 
 - v. ;  25 cm. 
<br/><br/> Contents: book 1. Algebra and functions.-  book 2.  Algebra And Fuctions.-  Book 3.  Trigonometric functions and applications 
<br/><br/><label>ISBN: </label>0471417378 
<br/><br/><label>LCCN: </label>75-009733 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--1961-<br/>Mathematics--Programmed instruction