Methods and costs of mining lignite in North Dakota, by J. N. Van Sant and R. C. Ellman.

By: Contributor(s): Material type: TextTextSeries: Information circular (United States. Bureau of Mines) ; 7891.Publication details: [Washington], U.S. Dept. of the Interior, Bureau of Mines, 1959.Description: iv, 82 p. illus., maps, tables. 27 cmSubject(s): LOC classification:
  • TN295 .U4 no. 7891
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