Pittsburgh and Boston Copper Harbor Mining Company
E2221737
UNEXPLORED
The Pittsburgh and Boston Copper Harbor Mining Company was a 19th-century American mining firm involved in copper extraction in Michigan’s Keweenaw Peninsula.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Pittsburgh and Boston Copper Harbor Mining Company canonical | 1 |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.