Held, Gilbert,  1943- <br/><br/>
Data communications networking devices :  operation, utilization, and LAN and WAN internetworking / 
Gilbert Held. 
 - 4th ed. 
 - New York :  Wiley,  1999 
 - xxiv, 855 p.;  26 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>047197515X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer networks<br/>Computer networks--Equipment and supplies<br/>Data transmission systems