Barcelon, Dolores G. <br/><br/>
Plane trigonometry. 

 - Meycauayan, Bulacan :  Trinitas Publishing, Inc,  c2003. 
 - 228 p. :  ill. ;  25 cm. 
<br/><br/> Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9714204119