00327nam a2200133Ia 4500008004100000100001200041245003700053250001100090260004400101300000800145650001600153942000700169999001700176190216s9999||||xx |||||||||||||| ||und||  aLiu.C.L 0aElements Of Discrete Mathematics  aSECOND  bMcgraw-Hill International Editionc1985  a433  aMathematics  cBK  c31517d31517