• 3 DVDs

• 4 Environmental aspects
• 4 Public lands
• 2 Animal rights
• 2 Donkeys
• 2 Environmentalism
• 2 Government policy
• 2 Herding
• 2 Management
• 2 Mustang
• 2 Ranchers
• 2 Wild horses
• 2 Wildlife conservation
• 1 All terrain vehicles
• 1 Conservation
• 1 Environmental ethics
• 1 Grassland ecology
• 1 Horses
• 1 Land use
• 1 Natural resources
• 1 Off-road vehicles
• 1 Personal watercraft
• 1 Pests
• 1 Prairie dogs
• 1 Recreation
• 1 Recreational use

• 5 Hawes-Davis, Doug
• 4 Bullfrog Films
• 4 Ecology Center, Inc
• 2 Alison, Bob
• 2 Carr, Drury Gunn
• 2 Flores, Dan, 1948-
• 2 Fund for Animals
• 1 Big Sky Pictures
• 1 Bull Frog Films
• 1 DeFelice, Joe
• 1 Drimal, C. Wolf
• 1 Ecology Center, Inc.
• 1 Fazio, Pat
• 1 Harrington, Richard
• 1 Higgins, Margot
• 1 Kirkpatrick, Jay F
• 1 Kirkpatrick, Jay F.
• 1 Lilburn, John
• 1 Zugel, Marianne

• 6 English

• 2 West (U.S.)
• 1 Great Plains

• 4 Documentary films
• 3 Environmental films
• 3 Nonfiction films
• 1 Educational films
• 1 Feature films
• 1 Wildlife films

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