• 5 Verona Shelving Facility
• 4 Steenbock Library
• 1 Memorial Library
• 1 Science Libraries Shelving Facility

• 12 DVDs
• 1 VHS Videocassettes

• 52 Conservation of natural resources
• 19 Climatic changes
• 14 Endangered species
• 10 Renewable energy sources
• 9 Ecology
• 5 Animals
• 5 Conservation
• 5 Elephants
• 5 Environmental aspects
• 5 Human-animal relationships
• 4 Gorilla
• 4 Mustang
• 4 National parks and reserves
• 4 Recycling (Waste, etc.)
• 4 Wild horses
• 4 Wildlife refuges
• 3 Behavior
• 3 Bison
• 3 Environmentalism
• 3 Research
• 3 Sloths
• 3 Tiger
• 3 Whales
• 3 Wildlife rehabilitation

• 33 Alexander Street Press
• 30 Farrow, Nick
• 24 Nicholas, Damian
• 24 Roberts, Paul
• 24 Thompson, Andrew
• 13 Switch International
• 12 Bartlett, G. (Gillian)
• 12 Bartlett, Gillian
• 8 Bullfrog Films
• 6 Holmes, Abbe
• 5 British Broadcasting Corporation
• 5 Irvine, Mark
• 5 Thomson, Andrew
• 4 Kanopy (Firm)
• 4 Thomson, Elisa
• 3 Burchfield, Geoffrey
• 3 Green Planet Films
• 3 Hawes-Davis, Doug
• 3 Independent Television Service
• 3 Square Sheep Films
• 3 Thomas, Larry
• 3 Wivell, Mike
• 2 Ballance, Alison
• 2 Botha, Albert
• 2 Boudart, Bo

• 133 English
• 3 Spanish
• 2 Chinese
• 2 Masai
• 1 Herero
• 1 Hindi
• 1 Kamba
• 1 Swahili

• 7 United States
• 5 Australia
• 3 Africa
• 3 Canada
• 3 Fiji
• 3 India
• 3 Kenya
• 3 Zimbabwe
• 2 Alaska
• 2 Arctic National Wildlife Refuge
• 2 Arctic National Wildlife Refuge (Alaska)
• 2 Cameroon
• 2 Great Barrier Reef (Qld.)
• 2 Indian Ocean Region
• 2 Indonesia
• 2 Mozambique
• 2 Namibia
• 2 Russia (Federation)
• 2 Russian Far East
• 2 Rwanda
• 2 South Africa
• 2 SouthAfrica
• 2 Stonehenge World Heritage Site (England)
• 2 West (U.S.)
• 2 Yellowstone National Park

Limit year range