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Subject
- Maps242
- Roads111
- Railroads84
- Nautical charts43
- Early works to 180042
- History34
- Administrative and political divisions29
- Facsimiles29
- Description and travel27
- Triangulation26
- Geology22
- Real property21
- Coasts18
- Aerial views16
- Defenses15
- Fortification15
- History, Military15
- Navigation15
- Buildings, structures, etc14
- Early maps13