Author: | Healey, M. V. |
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Year: | 1930 |
Document Type: | MAIN |
Issuing Agency: | U.S. Dept. of Commerce, Bureau of Mines, |
SUDOC: | C 22.11:6274 |
Series: | Information circular ; |
Report Number: | 6274 |
Subject: | Manganese ores--United States |
Link: | https://hdl.handle.net/2027/mdp.39015095083674 |