Buckingham, D.A. <br/><br/>
Availability of elemental sulfur and pyrite concentrate market economy countries 
Buckingham, D.A. 
 - Washington  Bureau of mines  1986 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MINERIA<br/>ECONOMIA<br/>AZUFRE<br/>PIRITA
<br/><br/><label>Universal Decimal Class. No.: </label>622:330