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*1001 $aSherman, Kenneth$0(NO-TrBIB)90663609$_31005100
*24510$aData communications :$ba users guide$cKenneth Sherman
*260  $aReston, Va.$bReston Publ.$cc1981
*300  $axix, 348 s.$bill.
*650 0$aComputer networks$_10287600
*650 0$aData transmission systems$_27585900
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