00325    a2200121   450000100060000008200180000610000210002424500690004525000060011426000360012030000220015650000250017838872  a621.38415 ROD  aRoden, Martin S.  aAnalog and Digital Communication system, 4rth EdcMartin S.Roden  a4  aNew JerseybPrentice Hallc1991  a505 p.bphotocopy  aBE textbook Avionics