00474nam a22001697a 4500003000800000008004100008020001800049041001300067082001500080100002000095245007100115250000800186260003500194650003000229700002300259700002200282SLTCLib260108b        ce ||||| |||| 00| 0 eng d  a9788131503324  aEnglish   a004.7bSHE  aSgelly, Gary B.  aBusiness Data CommunicationsbIntroductory Concepts and Techniques  a4th  a IndiabCengage Learningc2004 0aCommunication in Business  aCashman, Thomas J.  aSerwatka, Judy A.