00286pam a2200121 a 4500020000500000041000500005082001500010100002200025245005400047250000800101260004300109300001200152  c  h  a621.382.75  aGOWAR (J)eauthor  aOptical Communication Systems  hTextual Document  a2nd  bPrentice Hall of India New Delhic2000  aXVI,696