00439nam a2200157Ia 4500008004100000020001400041082001600055100001800071245005300089250000800142260003200150300003100182500001900213600003400232650001500266240925s9999    xx            000 0 und d  a810409607  a621.387 TAL  aTalley, David 0aBasic Electronic Switching for Telephone Systems  a2nd  aNew Jersey:bHaydenc,1982.  axxvii,499p.bNAfPhotocopy  aIncludes Index  aTelecommunication Engineering  aTechnology