TY  - BOOK
AU  - Favila,Raymundo Acosta
AU  - Doval Santos, Esther L.
TI  - Modern trigonometry : from the function standpoint
AV  - QA 531 F39 1976
PY  - 1976///]
CY  - [Manila]
PB  - National Book Store
KW  - Trigonometry
ER  -