Roof bolting and dust control
By: by James Westfield ... [et al.].
Contributors: Westfield, James.; United States. Bureau of Mines.
Series: Information circular (United States. Bureau of Mines) -- 7615
Publisher: U.S. Dept. of the Interior, Bureau of Mines
Published: 1951
Place of publication: Washington, DC
Language: eng
Notes: Bibliogr.

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