Engelsohn, Harold S <br/><br/>
Trigonometry : a complete and concrete approach / 

 - New York :  McGraw-Hill  1981 
 - x, 470p. : ill. 
<br/><br/><label>ISBN: </label>007019419X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MATHEMATICS--HANDBOOKS, MANUALS, ETC<br/>TRIGONOMETRY
<br/><br/><label>LC Class. No.: </label>QA 531 Eng