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Cover image for Operating Regulations to Govern Coal-mining Methods and the Safety and Welfare of Miners on Leased Lands on the Public Domain Under the Act of February 25, 1920 (Public No. 146)
Title:
Operating Regulations to Govern Coal-mining Methods and the Safety and Welfare of Miners on Leased Lands on the Public Domain Under the Act of February 25, 1920 (Public No. 146)

Operating Regulations to Govern Coal-mining Methods and the Safety and Welfare of Miners on Leased Lands on the Public Domain Under the Act of February 25, 1920 (Public No. 146).
Author:
United States. Bureau of Mines.
Subject:
Coal mines and mining
United States
Coal mines and mining -- United States.
United States.
Publisher:
Govt. print. off.
Date:
1921
Digital Format:
HTML

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Kindle

EPUB
Language:
English
Source:
http://openlibrary.org/works/OL1510111W
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