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Subject
- Transportation24
- Railroads16
- World maps16
- Roads15
- World War, 1939-194514
- Azimuthal equidistant projection (Cartography)13
- Distances, etc10
- Federal aid to transportation10
- Maps10
- Administrative and political divisions9
- Military maps8
- Aeronautical charts6
- Geology5
- Boundaries4
- Coasts4
- Ethnology4
- Land use4
- Harbors3
- Industries3
- Agriculture2
