| 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). |
| Author: | United States. Bureau of Mines |
| Note: | Govt. print. off., 1921 |
| Link: | page images at HathiTrust |
| No stable link: | This is an uncurated book entry from our extended bookshelves, readable online now but without a stable link here. You should not bookmark this page, but you can request that we add this book to our curated collection, which has stable links. |
| Subject: | Coal mines and mining -- United States |
| Other copies: | Look for editions of this book at your library, or elsewhere. |
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