Sobel, Max A. <br/><br/>
Algebra and trigonometry :  a pre-calculus approach / 
Max A. Sobel and Norbert Lerner 
 - Englewood Cliffs, N. J. :  Prentice-Hall,  1979 
 - xvi, 530 p. :  ill. ;  25 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>0130217093 
<br/><br/><label>LCCN: </label>78-021530 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Algebra<br/>Trigonometry