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Places
- China -- Economic conditions -- 20th century1
- China -- Politics and government -- 20th century1
- Eklutna Dam (Alaska)1
- Europe -- Ethnic relations -- History -- 20th century1
- Great Lakes (North America) -- Regulation1
- Niagara Falls (N.Y. and Ont.)1
- Niagara Falls (N.Y. and Ont.) -- Regulation1
- Saint Lawrence Seaway1
- Taiwan -- Foreign relations -- China1
- United States -- Emigration and immigration -- Government policy1
- United States -- Politics and government -- 1945-19891
- United States -- Politics and government -- 20th century1