000 00306nam a2200133Ia 4500
008 241226s9999 xx 000 0 und d
020 _a0
082 _a1.0202
_bCHO
100 _aChopra Ravi
245 0 _aKey to met
260 _aNew Delhi :
_bGajanan,
_c2021.
350 _a275
650 _aCommunication
999 _c163805
_d163805