Wilderness areas - United States.

Protecting visibility in national parks and wilderness areas / by: (Language materials, printed)

Promised land : = adventures and encounters in wild America / by: (Language materials, printed)

Wilderness in national parks : = playground or preserve / by: (Language materials, printed)

Seeds of restoration success = wild lands and plant diversity in the U.S. / by: (Electronic resources)

Return of the wild : = the future of our natural lands / by: (Language materials, printed)

Monitoring wilderness stream ecosystems / by: (Language materials, printed)

Battle for the wilderness by: (Electronic resources)

The multiple values of wilderness / by: (Language materials, printed)

National parks and reserves- United States.

Visibility- United States.

Nature conservation- United States.

Applied Ecology.

Haze- Environmental aspects- United States.

Wilderness areas- Social aspects- United States.

Air quality management- United States.

Wilderness areas- Economic aspects- United States.

Stream ecology- United States.

Plant diversity- United States.

Restoration ecology- United States.

Plant Ecology.

Nature Conservation.

Wilderness areas- United States.

Biodiversity.

Conservation Biology/Ecology.

Plant Systematics/Taxonomy/Biogeography.