Ram, Badri and Vishwakarama, D. N.  <br/><br/>
Power system protection and switchgear / 

 - New Delhi,  Tata McGraw Hill,  c2007. 
 - xi, 456 p. ;  ill. ;  22 cm.  
<br/><br/><label>ISBN: </label>9780074623503 
<br/><br/><label>Dewey Class. No.: </label>621.317