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- Railroads--West (U.S.)--Maps8
- Gold mines and mining--California--Maps3
- Indians of North America--Maps3
- Postal service--West (U.S.)--Maps3
- Pacific railroads--Explorations and surveys--Maps2
- Colorado--Gold discoveries--Maps1
- Gold mines and mining--Colorado--Maps1
- Gold mines and mining--Idaho--Maps1
- Indian reservations--Maps1
- Indians--Languages--Maps1
- Mercury mines and mining--California--Maps1
- Military departments and divisions--West (U.S.)--Maps1
- Roads--West (U.S.)--Maps1
