00294nam a2200109Ia 4500008004100000041000800041082002000049100001400069245003400083260005400117300001300171231228s1996    xx            000 0 und d  aeng  a621.382.75bGOW  aGOWAR (J)  aOptical Communication Systems  aNew DelhibPrentice Hall of India New Delhic1996  axvi, 696