The basics book of X.25 packet switching 

 - 2nd ed. 
 - Reading  Addison-Wesley  1992 
 -  Illustration 
 - The Motorola Codex Basics Book Series .
<br/><br/><label>ISBN: </label>020156369X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>COMPUTER SCIENCE
<br/><br/><label>Dewey Class. No.: </label>004.66  / BAS