TY  - BOOK
AU  - Bryant-Mole, Karen
AU  - Adding & subtracting puzzles
AU  - Series: Usborne Skills
TI  - Adding & subtracting puzzles 
SN  - 0746010745
PY  - 1992///
CY  - London 
PB  - Usborne House 
KW  - Mathematics - Study and teaching
ER  -