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Subject (Topic)
- Copper mines and mining--Michigan--Keweenaw County--Maps.4
- Real property--Ontario--Thunder Bay Region--Maps.4
- Copper mines and mining2
- Copper mines and mining--Michigan--Houghton County--Maps.2
- Copper mines and mining--Michigan--Keweenaw Peninsula--Maps.2
- Copper mines and mining--Michigan--Ontonagon County--Maps.2
- Landowners--Michigan--Houghton County--Maps.2
- Mines and mineral resources--Ontario--Thunder Bay Region--Maps.2
- Real property--Michigan--Houghton County--Maps.2
- Silver mines and mining--Ontario--Thunder Bay Region--Maps.2
- Copper mines and mining--Michigan--Maps.1
- Copper mines and mining--Virginia--Madison County--Maps.1
- Discoveries in geography1
- Landowners1
- Landowners--Michigan--Keweenaw County--Maps.1
- Landowners--Ontario--Thunder Bay--Maps.1
- Mines and mineral resources1
- Mines and mineral resources--1
- Mines and mineral resources--Ontario.1
- Real property--Maps1