TY  - BOOK
T1  - Trigonometry
A1  - Larson, Roland E. 1941-
A2  - Hostetler, Robert P.
A2  - Heyd, David E.
LA  - English
PP  - Lexington, Mass.
PB  - D.C. Heath
YR  - 1989
ED  - 2nd ed.
UL  - https://ds.mainlib.upd.edu.ph/Record/UP-99796217602874872
OP  - 67
CN  - QA 531 L37 1989
SN  - 0669162663
KW  - Trigonometry.
ER  -