I J Nagrath, M Gopal <br/><br/>
Control systems engineering 

 - 2nd ed 
 - New Age International, New Delhi  1982 
 - xii,725p ill. 
<br/><br/><label>ISBN: </label>0-85226-605-7 
<br/><br/><label>Dewey Class. No.: </label>621.3811 Nag/Gop