Sobel, Max A. & Lerner, Norbert <br/><br/>
Algebra and Trigonometry : A Pre-Calculus Approach 
By Max A. Sobel & Nobert Lerner 
 - Second Edition 
 -  Prentice Hall  1993 
 - xviii,524 pages, 25 cm. 
<br/><br/> include index 
<br/><br/><label>ISBN: </label>971-08-2401-5 
<br/><br/><label>Dewey Class. No.: </label>512.13 So1 1983