Catalog Record: How to prevent death and injury from falls of roof in coal mines | HathiTrust Digital Library

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How to prevent death and injury from falls of roof in coal mines /
by J.W. Paul.

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Main Author: Paul, J. W.
Language(s): English
Published: Washington, D.C. : U.S. Dept. of Commerce, Bureau of Mines, 1932.
Subjects: Coal mines and mining.
Coal mine accidents.
Coal mines and mining.
Coal mine accidents.
Physical Description: 13 pages : illustrations ; 27 cm.
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