Engelsohn, Harold S. <br/><br/>
Trigonometry / 
Harold S. Engelsohn 
 - New York :  McGraw-Hill,  1981 
<br/><br/><label>ISBN: </label>007019419X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry
<br/><br/><label>Dewey Class. No.: </label>516.24  / ENG