Drilling and blasting, open-cut iron-ore mines Lake Superior district
By: by John A. Johnson, Floyd G. Anderson, and Roy G. Stott.
Contributors: Anderson, Floyd G.; Stott, Roy G.; United States. Bureau of Mines.
Series: Information circular (United States. Bureau of Mines) -- 7552
Publisher: U.S. Dept. of the Interior, Bureau of Mines
Published: 1950
Place of publication: Washington, DC
Language: eng
Number of pages: 37
Notes: Bibliogr.

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