Shelly, Gary B.  <br/><br/>
Business data communications :  introductory concepts and techniques / 
Gary B. Shelly, Thomas J. Cashman and Judy A. Serwatka. 
 - 4th ed. 
 - Australia :  Cengage,  c2004. 
 - various pages :  illustrations ;  25 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>8131503321 9788131503324 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Business--Data processing.<br/>Business--Communication systems--Data processing.<br/>Local area networks (Computer networks).<br/>Data transmission systems.
<br/><br/><label>Dewey Class. No.: </label>004.6 SHE