TY  - BOOK
AU  - Rivera,Derdinand
TI  - Math challenges: enhancement exercises for high school math 
SN  - 9716590695
PY  - 1998///
CY  - Makati City
PB  - Basic Media Systems
KW  - Mathematical recreations
N1  - Contents. -- v.1. Freshman. -- v.2. Sophomore. - v.3. Junior. -- v.4. Senior
ER  -