• 90 Videos, Slides, Films

• 34 History
• 33 Economic conditions
• 33 Immigrants
• 31 Labor
• 30 Energy facilities
• 30 Power resources
• 30 Power supply
• 30 Transportation
• 29 Technology
• 26 Imperialism
• 21 Social aspects
• 20 Business ethics
• 20 Social responsibility of business
• 19 Business
• 19 Economics
• 6 Economic history
• 6 Engineering
• 6 Physical sciences
• 6 Physics
• 6 Postwar reconstruction
• 6 Social sciences
• 5 Indians of North America
• 4 Politics and government
• 3 Mechanical engineering

• 54 Infobase
• 39 Films for the Humanities & Sciences (Firm)
• 10 Public Broadcasting Service (U.S.)
• 9 PBS (Firm)
• 8 Cerebellum Corporation (Firm)
• 8 FremantleMedia
• 7 Bloomberg LP
• 5 Avenue Education (Firm)
• 5 Burns, Ken, 1953-
• 4 CINEFETE (Firm)
• 4 Economist Group Limited (Firm)
• 4 Prelinger Archives
• 3 Arts and Entertainment Network
• 2 CNN (Firm)
• 2 Moyers, Bill D
• 2 Sunrise Media LLC
• 2 TV Only SAS (Firm)
• 1 A&E Networks (Firm)
• 1 A&E Television Networks, LLC
• 1 BBC (Firm)
• 1 Big Media Holdings LLC (Firm)
• 1 Cambridge Educational (Firm)
• 1 Canadian Broadcasting Corp. (Firm)
• 1 Ethical Markets Media (Firm)

• 33 United States
• 1 California
• 1 New York (N.Y.)
• 1 San Diego
• 1 San Diego (Calif.)
• 1 Transcontinental Railroad National Back Country Byway (Utah)
• 1 West (U.S.)

Limit year range