Silver, Howad A <br/><br/>
Trigonometry 
/ by Howad A. Silver 
 - New Jersy:  Prentice Hall,  1986. 
 - 236p. 
<br/><br/><label>ISBN: </label>013930801601 
<br/><br/><label>Dewey Class. No.: </label>516.24  / SIL/T