Sobel, Max A. <br/><br/>
Algebra and trigonometry  a pre-calculus approach 
by Max A. Sobel, Norbert Lerner 
 - New Jersey  Prentice-Hall  1979 
 - xvi, 530p  ix, incl ind. 
<br/><br/><label>ISBN: </label>0130217093 
<br/><br/><label>Dewey Class. No.: </label>512.13  / N79