David A. Stamper <br/><br/>
Business Data Communications 

 - 4th ed 
 -   The Benjamin/ Cummings Publishing Company, Inc.  ©1994 
<br/><br/><label>ISBN: </label>9780805377286  24.4 
<br/><br/><label>Dewey Class. No.: </label>004.6 STA.4