TY  - BOOK
AU  - Olvido, Lucrecia R.
AU  - Torreon, Charito G.,
AU  - Paez, Teresita F.,
AU  - Aquino, Rolando J.,
TI  - Pre-calculus: for Senior High School 
SN  - 9786214090471
PY  - 2016///
KW  - Calculus
KW  - Study and teaching
KW  - sears
N1  - Includes bibliographical references
ER  -