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Subject
- Boundaries6
- Maps6
- Coasts4
- Indians of North America4
- Railroads4
- Geology3
- Mexican War, 1846-18482
- Military bases2
- Mines and mineral resources2
- Monterrey, Battle of, Monterrey, Mexico, 18462
- Streets2
- Telegraph lines2
- Administrative and political divisions1
- Aerial photography in geology1
- Biotic communities1
- Buildings1
- Canals1
- Diplomatic and consular service1
- Faults (Geology)1
- Harbors1
