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Summarized Data of Copper Production
| Author: | Julihn, Carl Edward |
|---|---|
| Year: | 1928 |
| Document Type: | N/A |
| SUDOC: | I 28.38:1 |
| Series: | Economic paper (Bureau of Mines) |
| Subject: | Copper mines and mining. |
| Link: | https://digital.library.unt.edu/ark:/67531/metadc40306/ |
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