000			00351nam a2200133Ia 4500
008			220217s9999||||xx |||||||||||||| ||und||
082			_a621.382 2 POW
100			_aPowers, John _91891
245		0	_aIntroduction optic systems
250			_a2nd
260			_aTata Mcgraw hill _bNew Delhi _c1999
300			_b0
650			_aOPTICAL COMMUNICATION
999			_c167752 _d167752