Production:91830324
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| year | DMM | company | production | cumulative | type | depth | seam | thickness | method | days | emp |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1918 | John Swanson | 244 | 90 |
| year | DMM | company | production | cumulative | type | depth | seam | thickness | method | days | emp |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1918 | John Swanson | 244 | 90 |