TY  - BOOK
AU  - Favila, Raymundo A.
AU  - Doval Santos, Esther Z.
TI  - Modern trigonometry : from the functions stand-point
AV  - F QA 531 F32 1976 
PY  - 1976///
CY  - Manila
PB  - National Book Store
KW  - Trigonometry
ER  -