Broto, Antonio S., <br/><br/>
Self-learning lessons in trigonometry 
Antonio S. Broto 
 - Mandaluyong City :  National Book Store.  2012. 
 - 202 pages :  tables, figures ;  22 cm. 
<br/><br/><label>ISBN: </label>9710871285 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry.
<br/><br/><label>Dewey Class. No.: </label>516.24   / B795s