Our mineral world [motion picture].

Contributor(s): Material type: FilmFilmPublication details: Haymarket, Va. : Educational Media International, 1978.Description: 1 film reel (28 min.) : sd., col. ; 16 mmSubject(s): Summary: 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.
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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.

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