TY  - MANSCPT
AU  - Guiao, Lester D.
TI  - A proposed technique in multiplying four-digit numbers
PY  - 2013///
CY  - Magalang, Pampanga
PB  - Pampanga Agricultural College
UR  - http://192.168.1.92:8081/digitalresource/1457917211152_ut8691.pdf
ER  -