• 5 Videos, Slides, Films

• 2 DVDs
• 1 VHS Videocassettes

• 1 Animal painters
• 1 Artists
• 1 Audubon, John James, 1785-1851
• 1 Dakota Indians
• 1 Description and travel
• 1 Environmental aspects
• 1 Harriman Alaska Expedition (1899)
• 1 Harriman Expedition Retraced (2001)
• 1 History
• 1 Lakota dialect
• 1 Muir, John, 1838-1914
• 1 Natural history
• 1 Naturalists
• 1 Nature conservation
• 1 Ornithologists
• 1 Pinchot, Gifford, 1865-1946
• 1 Social aspects
• 1 Social life and customs
• 1 Study and teaching

• 5 Chowder, Ken
• 5 Florentine Films
• 5 Garey, Diane
• 4 Hott Productions
• 2 Bullfrog Films
• 2 Public Broadcasting Service (U.S.)
• 1 America's River Communities, Inc.
• 1 Bosco, Philip
• 1 Claus, Jeff
• 1 Cronyn, Hume
• 1 Direct Cinema Ltd
• 1 Drury, Ken
• 1 Einhorn, Richard, 1952 August 2-
• 1 Feldshuh, Tovah
• 1 Guerrero, Kimberly Norris
• 1 Hayden, Sophie
• 1 Hyman, Judy
• 1 Katz, Cindy
• 1 Language Conservancy
• 1 Litwin, Thomas S., 1951-
• 1 Moore, Allen
• 1 PBS Distribution (Firm)
• 1 Roché, Sebastian, 1964-
• 1 Sachs, Sharon

• 5 English

• 2 United States
• 1 Alaska
• 1 Cuyahoga River
• 1 Cuyahoga River (Ohio)
• 1 Hetch Hetchy Valley (Calif.)
• 1 Ohio

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