Lewis, Harry R.  <br/><br/>
Elements of the theory of computation  

 - 2nd  
 - New Delhi;  Prentice-Hall India Private Limited   2008 
<br/><br/><label>ISBN: </label>978-81-203-2233-2  
<br/><br/><label>Dewey Class. No.: </label>511.321  / LEW