00257nam a2200109Ia 4500100002300000654001600023245004900039260002300088082001600111300000800127546001200135  aLipschutz/Scymour   aMathematics  a2000 solved probems in Discrete  Mathematics  bMc Graw Hillc1992  a510.76bLIP  a404  aENGLISH