Shelly, Gary B. <br/><br/>
Business data communications :  introductory concepts and techniques / 
Gary B. Shelly, Thomas J. Cashman, Judy A. Serwatka. 
 - 4th ed. 
 - Boston, MA :  Thomson Course Technology,  2004. 
 - 1 v. (various pagings) 
<br/><br/>
<br/><br/><label>ISBN: </label>0789568063 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Business enterprises--Communication systems.<br/>Data transmission systems.<br/>Business enterprises--Computer networks.<br/>Data transmission systems.
<br/><br/><label>Dewey Class. No.: </label>004.6