Balmeo, Virginia G. <br/><br/>
Worktext in trigonometry for college freshmen / 
Virginia G. Balmeo. 
 - Manila :  Purely Books Trading & Publishing Corporation,  2012. 
 - iv, 153 pages :  illustrations ;  25 cm. 
<br/><br/> References: p.153. 
<br/><br/><label>ISBN: </label>9789719553045 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry.