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Subject (Region)
- District of Columbia164
- United States48
- Alaska Territory (1912-1959)16
- Russell Senate Office Building16
- California12
- Canal Zone12
- Great Britain11
- New York, New York9
- Oregon8
- London, England7
- Virginia7
- Arizona6
- Canada6
- Cannon House Office Building6
- Mexico6
- North Dakota6
- Panama Canal (Panama)6
- Puerto Rico6
- South Dakota6
- Washington6