Verma, S. N. <br/><br/>
Automatic control systems :  a textbook for engineering students / 
by S. N. Verma.  
 - Delhi :   Khanna pub.,  1992. 
 - ii, 559 p. :  ill. ;  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Automatic control.<br/>Relay control systems.