000 00262nam a2200109Ia 4500
008 230901s9999 xx 000 0 eng d
100 _aSingh (Sb)
245 0 _aCombinatorics And Graph Theary
250 _a1
260 _bKHANNA PUBLISHER
942 _2ddc
_cSCIENCE
999 _c16914
_d16914