Coal-mine explosives : their characteristics, selection and safe use / by J.E. Tiffany.
|Main Author:||Tiffany, J. E. 1879-.|
Washington, D.C. : U.S. Dept. of the Interior, Bureau of Mines, 1938.
Coal mine accidents.
Coal mines and mining.
"November 1938" -Cover.
20 p. :
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