Tan, Vidal A. <br/><br/>
Plane and spherical trigonometry / 
by Vidal A. Tan and Francisco A. Perez. 
 - rev. ed. 
 - Manila, Philippines :  Macaraig Publishing Co.,  1949. 
 - vii, 348p. :  illus.,  23cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plane trigonometry.<br/>Spherical trigonometry.
<br/><br/><label>LC Class. No.: </label>Fil QA 531  / T3 1949