shay, william a. <br/><br/>
understanding data communication and network  

 - 1 
 - pacific grove   books/cole publishing company  1999 
 - 711cms; 22cmsp 
<br/><br/><label>ISBN: </label>9.79E+12 
<br/><br/><label>Dewey Class. No.: </label>4.6  / sha/und