00335nam a22001217a 4500020001800000040000900018082001700027100001700044245004600061250001600107260004400123650004600167  a9788120321694  cNust  a621.382bTOM  aWayne Tomasi  aAdvanced electronic communication system   a5th Edition  aNew Delhi:bPrentice Hall India,c2003.  aAdvanced electronic communication system