TY  - BOOK
AU  - Olenych, Bob
TI  - Scholastic 40 cross-number puzzles : : addition & subtraction 
T2  - Scholastic grades 4-6
SN  - 0-439-51904-7
AV  - 793.74 Ol25 
PY  - 2004///
CY  - New York
PB  - Scholastic Teaching Resources
ER  -