1.
Discrete Mathematics: Mathematical Reasoning and Proof with Puzzles, Patterns, and Games
by Douglas E. Ensley, J. Winst...
ISBN: 9780471476023
2.
Discrete Mathematics Mathematical Reasoning and Proof with Puzzles, Patterns, and Games
by Ensley, Douglas E., Crawley...
ISBN: 9780471760979
List Price: $62.95
3.
Discrete Mathematics Mathematical Reasoning and Proof With Puzzles, Patterns, and Games
by Ensley, Douglas E., Crawley...
ISBN: 9780470086421
List Price: $223.95