Pyrites & Chemicals Development Co., ltd. 
(Ministry of Petroleum and Chemicals) 
 - New Delhi,  Lok Sabha Secretariat,  1967. 
 - v, 55 p.  23 cm. 
<br/><br/> Cover title. 
<br/><br/><label>LCCN: </label>sa 68012311 //r84 
<br/><br/><label>Subjects--Corporate Names: </label><br/>Pyrites & Chemicals Development Co.
<br/><br/><label>LC Class. No.: </label>HD9657.I44P93 
<br/><br/><label>Dewey Class. No.: </label>338.4/7/66