TY  - BOOK
AU  - Baltazar, Ethel Cecille M., Dy, Ana Liza M. & Vidar, Melvin A.
TI  - Plane and spherical trigonometry
SN  - 978-971-98-0164-1
U1  - Fil. 516.24 B216 C2014 
PY  - 2014///
CY  - Philippines
PB  - C & E Publishing, Inc.
ER  -