• 21 History
• 20 Economic conditions
• 20 Territorial expansion
• 19 Power (Social sciences)
• 5 Indians of North America
• 3 Politics and government
• 2 African Americans
• 2 Emigration and immigration
• 2 Hakim, Joy
• 2 History of US
• 2 Immigrants
• 2 Imperialism
• 2 Industrialization
• 2 Labor
• 1 Agriculture
• 1 Christianity
• 1 Civil law
• 1 Courts
• 1 Criminal law
• 1 Democracy
• 1 Deviant behavior
• 1 Ethnicity
• 1 Freedom of religion
• 1 Gold miners

• 18 Films Media Group
• 18 Films for the Humanities & Sciences (Firm)
• 6 Public Broadcasting Service (U.S.)
• 5 KERA Dallas/Ft. Worth (Television station)
• 4 Infobase
• 3 A&E Television Networks, LLC
• 2 Couric, Katie, 1957-
• 2 Kunhardt Productions
• 2 Kunhardt, Peter W.
• 2 Kunhardt, Philip B., III, 1951-
• 2 Steiner, Nancy
• 1 ABC News Productions
• 1 Dallas County Community College District
• 1 Dallas TeleLearning (Firm)
• 1 Dyer, Julia
• 1 MacNeil/Lehrer Productions
• 1 Marshall University
• 1 Sideways Film

• 21 English

• 21 United States
• 2 West (U.S.)
• 1 Pleasant Hill (Ky.)
• 1 San Antonio, Texas

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