000 00337nam a2200133Ia 4500
008 221231s9999 xx 000 0 und d
100 _aRadhakrishna N and Subba rao M
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245 0 _aDiscrete Mathematical Structures
260 _bprofessional pub
260 _c2000
300 _aPV
650 _aMathematics
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942 _cBE_BK
999 _c2479
_d2479