Trigonometry/ 
Dorothy Rees, Paul K. Rees.-- 
 - 2nd. 
 - [Quezon City]:  Ken Incorporated,  c1968 
 - 339 pages:  illustration;  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry
<br/><br/><label>Dewey Class. No.: </label>516   / R328 1965