TY  - BOOK
AU  - Baltazar, Ethel Cecille M.
AU  - Dy,Ana Liza M.
AU  - Vidar,Melvin A.
TI  - Plane and spherical trigonometry: text/workbook 
SN  - 9789719801641
PY  - 2014///
CY  - Quezon City
PB  - C & E Publishing, Inc
KW  - Trigonometry
KW  - Problems, exercises, etc
KW  - sears
KW  - Textbooks
N1  - Includes bibliographical references
ER  -