TY  - BOOK
AU  - Midthun,Joseph
AU  - Hiti,Samuel
TI  - Building Blocks Of Mathematics: Subtraction 
T2  - Building Blocks Of Mathematics
SN  - 9780716614371
U1  - 513 
PY  - 2013///
CY  - Chicago, IL
PB  - World Book
KW  - Mathematics
KW  - Number Subtraction
ER  -