Plane trigonometry: 
Loquinte, Dioscoro M. 
 - 2000 edition. 
 -  MPSC Publishing House,  2000 
 - 180 p. ;. 
<br/><br/>
<br/><br/><label>ISBN: </label>9-71921852-5 
<br/><br/><label>Dewey Class. No.: </label>F 516.24 L88p 2000