00252nam a2200109Ia 4500020001800000082001600018100001700034245002600051260003800077300000900115650001800124  a9780471595045  a511.6 TUC/A  aTucker, Alan 0aApplied Combinatorics  bJohn Wiley & SonsaNew Yorkc1995  a462p  aCombinatorics