00302nam a2200133Ia 4500008004100000100001500041245002500056250001200081260002700093300000800120650001600128942000700144999001700151190216s9999||||xx |||||||||||||| ||und||  aVatssa B S 0aDiscrete Mathematics  a3rd Ed.  bWishwa Prakashanc1993  a273  aMathematics  cBK  c31710d31710