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Subject
- Espionage441
- Soviet Union--Administrative and political divisions--Maps441
- Soviet Union--Maps441
- Soviet Union--Military policy441
- Imagery and Base Maps44
- Inland Waters35
- Multibeam mapping27
- Continental margins20
- Bathymetric maps13
- Digital elevation models13
- Elevation12
- Nautical charts10
- Coasts9
- Harbors9
- Maps9
- Topographic maps3
- Remote-sensing images2
- Sidescan sonar2
- Geology1
- Geoscientific Information1