TY  - BOOK
AU  - Salumbides Jr., Epifanio N.
TI  - Trigonometry : plane and spherical
SN  - 9718609008
U1  - Fil 516.242 Sa38t 
CY  - Quezon City
KW  - Plane
KW  - Spherical
KW  - Trigonometry
ER  -