Lumabas, Rogelio S. <br/><br/>
Plane and spherical trigonometry. 

 - Manila :  Alemar-Phoenix Publishing House, Inc.,  1980. 
 - xii, 396p. :  illus. ;  19cm. 
<br/><br/> Includes appendices and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>*Trigonometry, Plane.<br/>Trigonometry, Spherical.
<br/><br/><label>LC Class. No.: </label>F QA 531  / L84 1980