000 00300nam a2200133Ia 4500
008 221231s9999 xx 000 0 und d
100 _aLiu C L
_92357
245 0 _aElements of discrete mathematics
250 _a2
260 _c1977
300 _a265
650 _aMathematics
_92358
942 _cBE_BK
999 _c2482
_d2482