Rees, Dorothy. <br/><br/>
Trigonometry / 
Dorothy Rees, Paul K. Rees. 
 - 2nd ed. 
 - Quezon City :  KEN,  c1968. 
 - 339 p. : ill. 
<br/><br/> Includes appendix and index. 
<br/><br/><label>ISBN: </label>9718558116 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry.