• 1 College Library
• 1 Wisconsin's Water Library

• 23 Videos, Slides, Films

• 7 History
• 4 Inventions
• 4 Technology
• 3 Animals
• 3 Biotic communities
• 3 Civilization, Modern
• 3 Desert ecology
• 3 Habitat (Ecology)
• 3 Ocean
• 3 Technological innovations
• 3 Technology and civilization
• 2 Exploration
• 2 Inventors
• 2 Marine ecology
• 2 Medicine
• 2 Power resources
• 2 Research
• 2 Time measurements
• 1 Adaptation (Biology)
• 1 Air conditioning
• 1 Alexander, the Great, 356 B.C.-323 B.C
• 1 Alexandrian Library
• 1 Amphibians
• 1 Analysis
• 1 Animal diversity

• 7 PBS Distribution (Firm)
• 7 Public Broadcasting Service (U.S.)
• 4 Discovery Channel (Firm)
• 4 WGBH (Television station : Boston, Mass.)
• 3 Ambrose Video Publishing
• 3 Attenborough, David, 1926-
• 3 BBC Worldwide Americas, Inc
• 3 Bradshaw, Gideon (Television producer)
• 3 Burke, James, 1936-
• 3 Discovery Communications, Inc
• 3 Jackson, Mick
• 3 Kennard, David
• 3 Olding, Paul, 1973-
• 3 Time-Life Films
• 3 Warner Home Video (Firm)
• 2 2 Entertain (Firm)
• 2 Fothergill, Alastair
• 2 Goritsas, Demetri
• 2 Open University
• 2 Renouf, Jonathan
• 2 Thomas, Helen (Television producer)
• 2 WGBH Video (Firm)
• 2 Weaver, Sigourney, 1949-
• 1 2 Entertain Video (Firm)

• 23 English

• 3 Tropics
• 2 Cold regions
• 2 Earth (Planet)
• 2 Eastern Hemisphere
• 2 Northern Hemisphere
• 2 Southern Hemisphere
• 2 Western Hemisphere
• 1 Africa, West
• 1 Africa, Western
• 1 Alaska
• 1 Arctic regions
• 1 Botswana
• 1 British Columbia
• 1 Egypt
• 1 Europe
• 1 Great Plains
• 1 Greece
• 1 Juan de Fuca, Strait of (B.C. and Wash.)
• 1 Kalahari Desert
• 1 Kuwait
• 1 New York
• 1 New York (State)
• 1 Okavango River Delta
• 1 Outer space
• 1 Polar regions

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