TY  - BOOK
AU  - Dela Cruz,Lourdes P.
AU  - Sosa,Jaimena C.
AU  - Lopez,Amelia F.
TI  - Simplifying mathematical challenges grade 4
SN  - 9717193946
U1  - 510 
PY  - 2012///
CY  - Marikina City
PB  - InstructionalCoverage System Publishing, Inc.
KW  - Simplification in Mathematics
ER  -