Gary B. Shelly, Thomas J. Cashman, Judy A. Hill. <br/><br/>
Business data communications :  introductory concepts and techniques / 
Gary B. Shelly, Thomas J. Cashman, Judy A. Hill. 
 - 3rd 
 - Boston :  Course technology,  2001. 
 - various pagings 
<br/><br/>Includes index. 
<br/><br/><label>ISBN: </label>789559587 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Business enterprises --Communication systems. Data transmission systems. Business enterprises --Computer networks.
<br/><br/><label>Dewey Class. No.: </label>004.22 S545