Author: | Harrington, D. |
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Year: | 1930 |
Document Type: | MAIN |
Issuing Agency: | U.S. Dept. of Commerce, Bureau of Mines, |
SUDOC: | C 22.11:6400 |
Series: | Information circular / United States. Bureau of Mines ; |
Report Number: | 6400 |
Subject: | Mine safety--United States--Statistics |
Link: | https://hdl.handle.net/2027/mdp.39015095085646 |