Varma, S N <br/><br/>
Automatic control systems 

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 - New Delhi  Khanna  1979 
 - 559p.   
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<br/><br/><label>ISBN: </label>
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<br/><br/><label>Subjects--Index Terms: </label>Automatic control  Control systems 
<br/><br/><label>Dewey Class. No.: </label>621-52