Sheldon, Tom <br/><br/>
McGrawr-Hill Encyclopedia Of & Telecommunications 
Tom Sheldon 
 - New Delhi :  Tata McGraw-Hill Publishing Comjpany Limited,  c2001. 
 - xxxviii, 1447 p.:  ill.; 
<br/><br/><label>ISBN: </label>007044742x 
<br/><br/><label>Dewey Class. No.: </label>004.603  / SHE/MCG