000 00310nam a2200133Ia 4500
008 220201s2021 xx 000 0 eng d
082 _a658
_bGUP
100 _aGUPTA, C B
245 0 _aINTEReference NATIONAL BUSINESS/-
250 _a1st
260 _bS CHAND
_aDELHI
_c2021
300 _a300p.
942 _2ddc
_04
999 _c2520
_d2520