Alli/Syed R  <br/><br/>
Digital  switching system 

 -  Tata Mc Graw hill  2002 
 - 219 
<br/><br/><br/>ENGLISH 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>digital
<br/><br/><label>Dewey Class. No.: </label>621.387  / ALI