• 6 Videos, Slides, Films

• 3 Environmental conditions
• 2 Effect of human beings on
• 2 Environmental aspects
• 2 Environmental degradation
• 2 Natural history
• 2 Nature
• 2 Tourism
• 1 Behavior
• 1 Caribou
• 1 Caribou calving grounds
• 1 Ecology
• 1 Harbor seal
• 1 Harriman Alaska Expedition (1899)
• 1 Harriman Expedition Retraced (2001)
• 1 Peregrine falcon
• 1 Shore birds
• 1 Water conservation
• 1 Water use
• 1 Water-supply

• 3 Bullfrog Films
• 2 Bowermaster, Jon, 1954-
• 2 Cavanagh, Chris (Christopher)
• 2 Oceans 8 Films
• 2 Video Project
• 1 Allison, Leanne
• 1 Beaver, Chris
• 1 Chowder, Ken
• 1 Feldshuh, Tovah
• 1 Florentine Films
• 1 Fogel, Anson
• 1 Forge Motion Pictures (Firm)
• 1 Friesen, Tracey
• 1 Garey, Diane
• 1 Hott Productions
• 1 Hott, Lawrence R.
• 1 Irving, Judy
• 1 Litwin, Thomas S., 1951-
• 1 McBride, Peter (Photographer)
• 1 National Film Board of Canada
• 1 Pete McBride Photography (Firm)
• 1 Smith College. Clark Science Center
• 1 Waterman, Jonathan
• 1 Wilson, Diana
• 1 Yanehiro, Jan

• 6 English

• 2 Alaska
• 2 Galapagos Islands
• 1 Arctic National Wildlife Refuge
• 1 Arctic National Wildlife Refuge (Alaska)
• 1 California
• 1 Canada, Northern
• 1 Colorado River
• 1 Colorado River (Colo.-Mexico)
• 1 Colorado River Watershed
• 1 Colorado River Watershed (Colo.-Mexico)
• 1 North America
• 1 Northern Canada
• 1 San Francisco Bay Area
• 1 San Francisco Bay Area (Calif.)
• 1 Yukon

Limit year range