000 00329 a2200145 4500
020 _a978-93-87273-12-2
082 _a658.872 Mad.R1
100 _qMadan,Sushila
245 _aE-commerce
250 _a4th.
260 _aNew Delhi
_bScholar Tech Press
_c2021
300 _bQ8+6.41p.
650 _2Commerce
942 _2ddc
_cSU
999 _c271561
_d271561