00310nam a2200121Ia 4500008004100000041001200041082001100053100001900064245007300083260000600156650000600162700002000168221030s9999    xx            000 0 und d  aEnglish  a105.23  aBernard Kolman 0aDiscrete Mathematical Structurescby Bernard Kolman, Robert C. Busby  c0  aB  aRobert C. Busby