Mashelkar R A & Misra V K <br/><br/>
Nai Patent Vavastha Aur Bharat .-81-7138-103-0 

 -  Samayek Prakashan, New Delhi, India 
<br/><br/><label>ISBN: </label>81-7138-103-0 
<br/><br/><label>Dewey Class. No.: </label>Z2673.2  152P06/MASHELKAR R A/B25245