TY  - BOOK
AU  - Alfarez, Merle S.
TI  - Mental math tricks: Multiplication techniques 
SN  - 9789718740873
AV  - QA 135.6 .Al385 2008
PY  - 2008///
CY  - Quezon City
PB  - MSA Publishing House
KW  - Mathematics
ER  -