00313nam a2200121Ia 4500008004100000041000800041082002000049100001400069245003400083250000800117260005400125300001200179231228s2000    xx            000 0 und d  aeng  a621.382.75bGOW  aGOWAR (J)  aOptical Communication Systems  a2nd  aNew DelhibPrentice Hall of India New Delhic2000  aXVI,696