Our mineral world  [motion picture]. 

 - Haymarket, Va. :  Educational Media International,  1978. 
 - 1 film reel (28 min.) :  sd., col. ;  16 mm. 
<br/><br/> Cataloging information taken from container. 
<br/><br/> Topics included are : where minerals are found, modern techniques of exploration, how minerals formed in the earth, interdependence of mining and using countries, conserving our diminishing mineral resources. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mines and mineral resources.