TY  - BOOK
AU  - Apa-ap, Renato E. (et.al.)
TI  - Simplified approach to integral calculus
SN  - 971-08-6781-4
U1  - Fil. 515 Ap11 C2007 
PY  - 2007///
CY  - Philippines
PB  - National Book Store
ER  -