Subject
United States History
2,799
History
1,053
United States Politics and government
734
African Americans History
322
United States History Campaigns
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World politics
194
Baseball History
191
United States History, Military
190
United States Social conditions
181
World War, 1939-1945
171
United States Foreign relations
156
United States Economic conditions
146
Women and literature History
132
United States Civilization
122
United States Social life and customs
122
United States History Study and teaching
115
Women History
114
Criticism and interpretation
113
Constitutional history
112
United States History Causes
108
Depressions
107
United States Race relations
107
American literature History and criticism
105
United States Race relations History
98
Presidents History
93
Civil rights movements History
92
African Americans Civil rights History
87
Political science History
87
Reconstruction (U.S. history, 1865-1877)
86
International relations
85
Presidents
84
Political culture History
82
Political participation
82
Generals
81
History, Modern
81
Sociology
81
Motion pictures History
78
Slavery History
78
United States
78
Communication
77
Feminism History
76
Popular culture History
73
Literature and society History
68
Music History and criticism
68
Racism
67
War
67
Political and social views
66
Labor History
65
American fiction History and criticism
64
Industries History
64
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