000			00372nam a2200145Ia 4500
008			230106s9999 xx 000 0 und d
082			_a621.381 _bGO-O
100			_aGowar,John
245		0	_aOptical communication systems
250			_a2nd Ed.
260			_aNew Delhi _bPHI Learning Private Limited _c1992
300			_a696
650			_aElectronics Engineering
942			_cBK
999			_c340 _d340