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Subject
- Imagery and Base Maps2,275
- Farming1,111
- Urbanization599
- Metropolitan areas595
- Society595
- Crop yields572
- Harvesting525
- Land use482
- Espionage441
- Soviet Union--Administrative and political divisions--Maps441
- Soviet Union--Maps441
- Soviet Union--Military policy441
- Topographic maps381
- Census350
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- Land cover265
- Cities and towns253
- Historical geography202
- Environment184
- Oceans173