Gowar John  <br/><br/>
Optical Communication Systems 
John Gowar 
 - Second Edition  
 - New Delhi  Prentice Hall of India Private Linited  1966 
 - 696p, 
<br/><br/><label>ISBN: </label>8120308344 
<br/><br/><label>Dewey Class. No.: </label>621.380  / GOW/O