TY  - BOOK
AU  - Oracion,Vivencio III
AU  - Magno-Pavia,MaMargarita T.
TI  - Math challenges: volume 5 
SN  - 0119-582-4
U1  - Ref. 510.076 O631 1999 
PY  - 1999///
CY  - Philippines
PB  - Belgosa Media Systems, Inc.
KW  - Mathematics - Exercises
ER  -