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/><label>Subjects--Topical Terms: </label><br/>Data transmission systems
<br/><br/><label>Dewey Class. No.: </label>384