Educational Media International moving image motion picture xx Haymarket, Va Educational Media International 1978 monographic eng

motion picture

1 film reel (28 min.) : sd., col. ; 16 mm. 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. Cataloging information taken from container. Mines and mineral resources TKN 831005 20260227104100.0 995707870102311