Greg, W. David,  1933- <br/><br/>
Analog and digital communication :  concepts, systems, applications and services in electrical dissemination of aural, visual and data information / 
W. David Gregg 
 - New York :  John Wiley & Sons,  1977 
 - 603 p. :  ill. ;  2 4cm. 
<br/><br/> Includes index 
<br/><br/><label>LCCN: </label>76-58417 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication