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Subject
- Boundaries39
- Coast defenses9
- Military architecture8
- Nautical charts8
- San Juan Boundary Dispute (1846-1872)7
- British North American Exploring Expedition3
- Green marketing2
- Hudson's Bay Company2
- Tourist maps2
- United States Coast Survey2
- Alaskan Boundary Tribunal1
- Assiniboine and Saskatchewan Exploring Expedition1
- Boundary disputes1
- Environmental conditions1
- North American Boundary Commission1
- Northwest boundary of the United States1
- Outdoor recreation1
- Outdoor recreation--Environmental aspects1