Shelly, Gary B., <br/><br/>
Business data communications :  introductory concepts and techniques / 
Gary B. Shelly, Thomas J. Cashman, Judy A. Serwatka. 
 - 1 volume (various pagings) ; colour illustrations, colour maps ;  28 cm. 
 - Shelly Cashman series .
 - Shelly Cashman series. .
<br/><br/> Previous edition : 2001. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9780789568069 (paperback)  Hadiah 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data transmission systems.