Vrat P <br/><br/>
Productivity management: systems approach 
Vrat P; Sardana G D And Others 
 - New Delhi  New Delhi, Narosa Publishing House  1998 
 - 300p 
<br/><br/><label>ISBN: </label>81-7319-147-6 
<br/><br/><label>Source: </label>Textbook