00334nam a2200133Ia 4500008004100000020001500041041001200056082001600068100001200084245005200096260002500148300000800173650001900181221030s9999    xx            000 0 und d  a8120311892  aEnglish  a105.23bDea  aN. Dean 4aThe Essence of Discrete Mathematicscby N. Dean  bPHIaNew Delhic1997  a197  aBE Mathematics