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Subject (Topic)
- Railroads--United States--Maps11
- Mexican War, 1846-1848--Maps3
- Monterrey, Battle of, Monterrey, Mexico, 1846--Maps3
- Railroads--Canada--Maps3
- Land grants--Texas--Maps2
- Railroads--Pennsylvania--Maps2
- Railroads--Texas--Maps2
- Administrative and political divisions1
- Canals--Pennsylvania--Maps1
- Coal--Pennsylvania--Maps1
- Geology--Missouri--Maps1
- Gold mines and mining--California--Maps1
- Harbors--Nova Scotia--Louisbourg--Maps--Early works to 18001
- Indians of North America--Maps1
- Iron industry and trade--Pennsylvania--Maps1
- Landowners--New York (State)--Ontario County--Maps1
- Maps shelf1
- Mercury mines and mining--California--Maps1
- Mines and mineral resources--Missouri--Maps1
- Petroleum industry and trade--Pennsylvania--Warren County--Maps1