000 00277nam a2200121Ia 4500
008 230303s9999 xx 000 0 und d
041 _aeng
082 _a004.6 GUP
100 _aGUPTA (Prakash. C)
245 _aData Communications
260 _aNew Delhi
_bPHI
365 _cRS
999 _c180923
_d180923