TY  - BOOK
AU  - Baltazar, Ethel Cecille M.
AU  - Dy, Ana Liza M.
AU  - Vidar, Melvin A.
TI  - Plane and spherical trigonometry
SN  - 978 971 980 164 1
U1  - FIL 516.24 B21p 2014 
PY  - 2014///
CY  - Quezon City
PB  - C & E publishing, 
KW  - Plane trigonometry
KW  - Spherical trigonometry
KW  - Trigonometry
N1  - Includes references
ER  -