World mineral statistics  production, exports, imports. 1991-95 
British geological survey. 
 - Keyworth  BGS  1996 
 - v, 294 p.  30 cm 
<br/><br/><label>ISBN: </label>0852722869 9780852722862 
<br/><br/><label>Subjects--Topical Terms: </label><br/>estadisticas<br/>mundiales<br/>minerales
<br/><br/><label>Universal Decimal Class. No.: </label>549 (410.146) (02)