000			00337nam a2200133Ia 4500
100			_aFrenzel, Louis E
020			_a0-07-066755-1
250			_a3rd ed
942			_cBK
245			_aPrinciples of electronic communication systems
260			_aTata Mcgraw-Hill Publishing, New Delhi _c2008
082			_a621.38 Fre
300			_axiii, 885
999			_c42562 _d42562