000 00272nam a2200109Ia 4500
008 230302s9999 xx 000 0 und d
082 _a510.240901SIN
100 _aSINGH (S.B)
245 _aDISCRETE STRUCTURES
260 _aNEW DELHI
_b KHANNA PUBLISHING
365 _cRS
999 _c157150
_d157150