TY  - BOOK
AU  - Catolos, Elvira C.
TI  - Plane and spherical trigonometry
SN  - 9789718211786
AV  - QA531 .P693 2009 
PY  - 0000///[date of publication not identified]
CY  - Malabon City
PB  - Mutya Publishing House
KW  - Trigonometry, Plane
KW  - Trigonometry, SphericalCatolos,
ER  -