00290nam a2200109Ia 4500008004100000020001800041041000800059082001200067100001000079245008300089260000800172211209s9999    xx            000 0 und d  a9780070681880  aeng  a511 ROS  aROSEN  aDISCRETE MATHEMATICS AND ITS APPLICATIONS WITH COMBINATORICS AND GRAPH THEORY   bMGH