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- Annotations (Provenance)--20th century✖[remove]4
- Cadastral maps4
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- Copper mines and mining--Michigan--Keweenaw County--Maps.2
- Copper mines and mining1
- Copper mines and mining--Michigan--Keweenaw Peninsula--Maps.1
- Copper mines and mining--Michigan--Ontonagon County--Maps.1
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- 1850 to 1874✖[remove]4
Current results range from 1859 to 1889