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Subject (Topic)
- Railroads--Michigan--Maps4
- Copper mines and mining2
- Copper mines and mining--Michigan--Houghton County--Maps2
- Copper mines and mining--Michigan--Keweenaw County--Maps.2
- Counties--Michigan--Maps2
- Geology--Michigan--Maps2
- Landowners--Michigan--Houghton County--Maps2
- Railroads--Middle West--Maps2
- Railroads--Northwestern States--Maps2
- Real property--Michigan--Houghton County--Maps2
- Coal mines and mining--Canada--Maps1
- Coal mines and mining--Northwestern States--Maps1
- Copper mines and mining--Michigan--Keweenaw Peninsula--Maps.1
- Counties--United States--Maps.1
- Counties--Wisconsin--Maps1
- Geology--Michigan--Grand Traverse Bay Region--Maps1
- Indian reservations--Montana--Maps1
- Iron mines and mining1
- Iron mines and mining--Michigan--Upper Peninsula--Maps.1
- Lakes--Wisconsin--Oconomowoc--Maps1