Subject categories
Anthropology, Ethnology, Exploration & Travel → Wilderness areas - United States
Climate, Environment, Natural Resources & Disasters → Environmental protection - Citizen participation
Climate, Environment, Natural Resources & Disasters → Natural history
Climate, Environment, Natural Resources & Disasters → Seasons - Canada
Climate, Environment, Natural Resources & Disasters → Wilderness areas - Canada
Climate, Environment, Natural Resources & Disasters → Wilderness areas - United States
Documentary
Documentary → Documentary films - United States
Literature → Creative writing
People → Olson, Sigurd F., 1899-
Short films
Short films → Short films - United States