National parks and reserves - Wyoming.

Visitor use of interpretive facilities at Fossil Butte National Monument, Wyoming / by: (Language materials, printed)

Yellowstone : = a journey through America's wild heart / by: (Language materials, printed)

National parks and reserves- Montana.

National parks and reserves- Idaho.

Outdoor recreation- Social aspects- Yellowstone National Park.

Public spaces- Social aspects- Yellowstone National Park.

Fossil Butte National Monument (Wyo.)

Nature conservation- Social aspects- Yellowstone National Park.

Utah State University- Dissertations.

National parks and reserves- Wyoming.

Yellowstone National Park.