Minerals challenge. (Film).
Contributors: United States. Bureau of Mines.; Union Pacific Railroad Company.
Publisher: Bureau of Mines, U.S. Dept. of Interior
Published: 1900
Place of publication: Washington, D.C
Language: eng
Number of pages: 29
Subjects: Mineralogy -- Technological innovations.; Mineralogy -- Research.
Description: About new techniques and technologies used to find and refine lower grade minerals, or minerals more difficult to obtain and locate. The minerals considered are : iron, coal, oil, soda ash, uranium, oil shale.-
Notes: Undergrad general.

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