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United States Politics and government
2,175
United States History
1,165
United States Foreign relations
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History
738
United States Social conditions
538
Presidents
510
United States Civilization
403
United States Race relations
347
United States Economic conditions
331
Presidents Election
287
United States
267
Baseball players
262
United States Social life and customs
259
United States Economic policy
236
Baseball History
183
Constitutional history
183
Criticism and interpretation
175
Public opinion
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United States Relations
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Constitutional law
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American literature History and criticism
154
School management and organization
154
World War, 1939-1945
149
Legislators
148
Civil rights
144
Educational leadership
143
Multicultural education
143
World politics
139
Frontier and pioneer life
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Generals
133
Vietnam War, 1961-1975
131
United States Intellectual life
128
United States Religion
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School improvement programs
127
Educational change
124
United States Social policy
123
African Americans
122
United States History Campaigns
120
Criminal justice, Administration of
117
Families
115
Women and literature History
115
Political parties
114
Statesmen
114
Women
114
United States Military policy
113
National characteristics, American
112
Environmental policy
109
United States Description and travel
108
Elections
102
Democracy
101
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