TY  - BOOK
AU  - Sarmiento, Agnes Cenen E. 
TI  - Plane and spherical trigonometry
SN  - 9789710388776
AV  - QA 531  .Sa246 2009
PY  - 2009///
CY  - Mandaluyong City
PB  -  Books Atbp. Publishing
ER  -