Held, Gilbert,  1943- <br/><br/>
Data communications :  a comprehensive approach / 
Gilbert Held, Ray Sarch. 
 - New York, N.Y. :  Data Communications,  c1983. 
 - xviii, 441 p. :  ill. ;  24 cm. 
 - Data communications book series .
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. xviii. 
<br/><br/><label>ISBN: </label>0076000036 
<br/><br/><label>LCCN: </label>83010054  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data transmission systems.
<br/><br/><label>LC Class. No.: </label>TK 5 105 .H425 1983  / .H425 1983 
<br/><br/><label>Dewey Class. No.: </label>004.6