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Questions and answers on timbering bituminous coal mines
- Author / Creator
- Available as
- Physical
- Summary
-
On use of lumber to support mine roof.
Details
Checking for availability...
- Creator
- by J.W. Paul
- Format
- Books
- Language
- English
- Contributors
- Publication
-
- Washington, D.C. : United States Government Printing Office, 1928
- Series
- Physical Details
-
- ii, 32 pages : illustrations ; 23 cm
- OCLC
- ocm49473338
- At head of title: Department of Commerce, Herbert Hoover, Secretary. Bureau of Mines, Scott Turner, Director.