000 00276nam a2200121Ia 4500
020 _a9780070667556
100 _aLouis E Frenzel
245 _aPrinciples of electronic communication systems
250 _a3rd
260 _c2008
_bTMH
_aNew Delhi
300 _a885
942 _cBK
999 _c31425
_d31425