00489nam a2200157Ia 4500008004100000020001400041082001400055100002100069245005800090250000700148260004500155300004100200500001900241600002100260650005000281240925s9999    xx            000 0 und d  a333646894  a004.6 SIM  aSimmonds, Andrew 0aData Communications and Transmission: an introduction  aNA  aIndianapolis:bMacmillan PublicationcNA  axii,530p.bNAfInternational Edition  aIncludes Index  aComputer Science  aComputer science, information & general works