TY  - GEN
AU  - Ensley, Douglas E.
AU  - Cradley, J. Winston
TI  - Discrete mathematics: mathematical reasoning and proof with puzzles patterns and games
SN  - 0471476021
PY  - 2006///
CY  - U.S.A
PB  - John Wiley & Sons Ltd.
KW  - Logic, symbolic and mathematical
KW  - Mathematical recreations
KW  - Computer science - mathematics
ER  -