00908cam a22002651 4500 int59000040 DLC 20260227111517.0 780303s1959 dcuab f000 0 eng int59000040 (OCoLC)3685619 DLC NdU OCoLC DLC premarc n-us-nd TN295 .U4 no. 7891 Van Sant, Joel N. Methods and costs of mining lignite in North Dakota, by J. N. Van Sant and R. C. Ellman. [Washington], U.S. Dept. of the Interior, Bureau of Mines, 1959. iv, 82 p. illus., maps, tables. 27 cm. United States. Bureau of Mines. Information circular 7891 Lignite North Dakota. Strip mining. Ellman, R. C., joint author. Information circular (United States. Bureau of Mines) ; 7891. 34814 34814