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Subject (Region)
- District of Columbia183
- United States85
- Mississippi River63
- Great Lakes57
- Great Britain42
- Washington Aqueduct (District of Columbia)36
- Utah Territory (1850-1896)34
- Mexico33
- New Mexico Territory (1850-1912)33
- France28
- White House25
- Alaska Territory (1912-1959)23
- Arizona Territory (1863-1912)23
- Yellowstone National Park22
- Alaska, Department and District of (1867-1912)21
- Spain21
- Indian Territory (1834-1907)20
- California19
- China16
- Canada15