• 5 Videos, Slides, Films

• 4 History
• 2 Civilian Conservation Corps (U.S.)
• 2 Conservation of natural resources
• 2 Forest conservation
• 2 Politics and government
• 2 Public service employment
• 2 Social conditions
• 1 Businesspeople
• 1 Capitalists and financiers
• 1 Carnegie, Andrew, 1835-1919
• 1 Civilization
• 1 Depressions
• 1 Droughts
• 1 Dust Bowl Era, 1931-1939
• 1 Dust storms
• 1 Economic policy
• 1 Edison, Thomas A. (Thomas Alva), 1847-1931
• 1 Employees
• 1 Ford, Henry, 1863-1947
• 1 Horse racing
• 1 Industrialists
• 1 Morgan, J. Pierpont (John Pierpont), 1837-1913
• 1 New Deal, 1933-1939
• 1 Nineteen fifties

• 2 PBS Distribution (Firm)
• 2 Stone, Robert, 1958-
• 2 WGBH Educational Foundation
• 1 A & E Home Video (Firm)
• 1 Allen, Glenn
• 1 Arts and Entertainment Network
• 1 Blumer, Ronald H.
• 1 Brainstorm Digital (Firm)
• 1 Chmiel, Michael
• 1 Counsman, Randy
• 1 Dahlby, Tracy
• 1 David, Stephen
• 1 Ferrari, Michelle
• 1 Fields, Ed
• 1 Gazit, Chana
• 1 Gibney, Alex
• 1 Guss, Alison
• 1 Halberstam, David
• 1 History (Television network)
• 1 History Channel (Television network)
• 1 Hovde, Ellen
• 1 Ives, Stephen
• 1 Jennings, Peter, 1938-2005
• 1 Lions Gate Entertainment (Firm)
• 1 MPI Home Video (Firm)

• 5 English

• 1 Great Plains
• 1 Hoover Dam (Ariz. and Nev.)

• 5 Documentary television programs
• 3 Nonfiction television programs
• 2 Biography
• 2 Video recordings for the hearing impaired
• 1 Biographical television programs
• 1 Documentary films
• 1 Educational television programs
• 1 Personal narratives

Limit year range