Nature - Effect of human beings on - United States.

The ecological vision : = reflections on the American condition / by: (Language materials, printed)

Environment and history : = the taming of nature in the USA and South Africa / by: (Language materials, printed)

The grasslands of the United States : = an environmental history / by: (Language materials, printed)

American environmental history / by: (Language materials, printed)

Footprints on the land : = an assessment of demographic trends and the future of natural lands in the United States / by: (Language materials, printed)

The grasslands of the United States = an environmental history / by: (Language materials, printed)

Great debates in American environmental history by: (Language materials, printed)

The making of the American landscape / by: (Language materials, printed)

Community.

Nature- Effect of human beings on- United States.

Social ecology- United States.

United States- Social conditions.

United States- Population

Human ecology- United States.

Human ecology- History.- United States

Landscape changes- North America.

Environmentalism- History.- United States

Nature- Effect of human beings on- South Africa.

Grassland ecology- United States.

Human geography- United States.

Land use- United States.

United States

Environmentalism- History.- South Africa

Indians of North America- Ethnobotany.

United States- Environmental conditions.

United States- Environmental conditions

Nature- Effect of human beings on- North America.

Landscape changes- United States.

Human geography- North America.