Underground transportation in the Ruhr coal-mining district of Germany / by R.W. Stahl, H.E. Sanford, and J.B. Benson.

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Main Author: Stahl, R. Ward
Corporate Author: United States. Bureau of Mines
Other Authors: Sanford, H. E., Benson, J. B.
Format: Government Document Book
Language:English
Published: [Washington] : U.S. Dept. of the Interior, Bureau of Mines, 1950.
Series:Information circular (United States. Bureau of Mines) ; 7547.
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