TY  - BOOK
AU  - Hopper,Alan R.
TI  - Mathematics in action
SN  - 0021090025
U1  - 510 
PY  - 1992///
CY  - New York
PB  - Macmillan/McGraw-Hill
KW  - Mathematics
KW  - Mathematical recreations
KW  - Number games
KW  - Puzzles
N1  - Primary
ER  -