TY  - BOOK
AU  - Gardner, M
TI  - Unexpected hanging and other mathematical diversions:a classical collection of puzzles and games
SN  - 9780226282565
U1  - 51-8 
PY  - 1991///
CY  - Chicago
PB  - University of chicago
KW  - MATHEMATICAL DIVERSION
KW  - PUZZLES
ER  -