000 00267nam a2200109Ia 4500
008 230411s9999 xx 000 0 und d
082 _a621.3893
_bGUP
100 _aGUPTA (R.G)
245 0 _aAudio And Video Engineering Systems
260 _bTMH
_aNEW DELHI
942 _cBB
999 _c8177
_d8177