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Subject
- Transportation24
- Railroads16
- World maps15
- Roads14
- Azimuthal equidistant projection (Cartography)13
- World War, 1939-194512
- Distances, etc10
- Federal aid to transportation10
- Maps10
- Administrative and political divisions8
- Military maps8
- Boundaries4
- Coasts4
- Geology4
- Aeronautical charts3
- Harbors3
- Industries3
- City planning2
- Forests and forestry2
- Geomagnetism2
