000 00294nam a2200121Ia 4500
008 190516s9999 xx 000 0 und d
100 _aTREHAN KRISHNA GULATI
245 0 _aINTRODUCTION SYSTEM MANAGEMENT
250 _a1
260 _c2019
_bSUN INDIA
300 _aD P
942 _cBK
999 _c18350
_d18350