000			00387nam a2200157Ia 4500
008			231217s9999 xx 000 0 und d
041			_aEnglish
082			_a621.380413 GUP;2
100			_aGupta, Sanjeeva
245		0	_aElectronics communications systems
250			_a1st ed.
260			_c1990 _bNew Delhi : Khanna,
300			_a796
650			_aCommunications
942			_cAA
999			_c161800 _d161800