• 31 African Americans
• 28 Politics and government
• 20 Economic conditions
• 17 Immigrants
• 15 Depressions
• 13 History and criticism
• 12 Indians of North America
• 11 Labor
• 11 Social life and customs
• 11 United States
• 10 Antiquities
• 10 Industries
• 10 Music
• 10 Musical form
• 10 Sports
• 10 Style, Musical
• 10 Territorial expansion
• 9 Civil rights movements
• 9 Imperialism
• 9 World War, 1939-1945
• 8 Civil rights
• 8 Power (Social sciences)
• 7 Hispanic Americans
• 7 History, Modern

• 133 Films Media Group
• 51 Infobase
• 22 Burns, Ken, 1953-
• 1 Gates, Henry Louis, Jr

• 133 English

• 105 United States
• 6 Asia
• 6 India
• 6 New York (N.Y.)
• 6 South Asia
• 6 West (U.S.)
• 3 Mississippi
• 2 America
• 2 Chicago
• 2 Illinois
• 2 Jerusalem
• 2 Middle East
• 2 New York
• 2 New York (State)
• 2 North America
• 1 Admirals
• 1 Alabama
• 1 Atlanta
• 1 Attica
• 1 Boston
• 1 California
• 1 Chicago (Ill.)
• 1 China
• 1 Detroit (Mich.)
• 1 Florida

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