000 00250nam a2200109Ia 4500
008 230901s9999 xx 000 0 eng d
100 _aHarary (Frank)
245 0 _aGraph Theary
250 _a1
260 _bNAROSA PUBLISIHING
942 _2ddc
_cSCIENCE
999 _c16913
_d16913