HELD, Gilbert <br/><br/>
Data communications networking devices 

 - 2nd ed. 
 -  John Wiley, Chichester  1989 
 - 494 p. 
<br/><br/><label>ISBN: </label>0000471918695 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer networks : Data transmission
<br/><br/><label>Dewey Class. No.: </label>004.6  / H24