Sheldon, Tom <br/><br/>
Encyclopedia of Networking & Telecommunications 
Tom Sheldon 
 -  McGraw-Hill  1970 
 - xxxviii, 1447 pages ;  ill. ;  24 cm. 
<br/><br/> Includes Index. 
<br/><br/><label>ISBN: </label>0-07-212005-3 
<br/><br/><label>Dewey Class. No.: </label>R/384.3/Sh4