000 00285nam a2200121Ia 4500
008 230303s9999 xx 000 0 und d
041 _aeng
082 _a621.38275 GOW
100 _aGOWAR (JOHN)
245 _aOptical Communication Systems
260 _aNEW DELHI
_bPHI
365 _cRS
999 _c194574
_d194574