Environmental protection - History - 20th century. - United States

FDR and the environment by: (書目-電子資源)

The promise of wildernessAmerican environmental politics since 1964 / by: (書目-電子資源)

Roosevelt, Franklin D.

Environmental policy

Environmental protection

United States

POLITICAL SCIENCE / Public Policy / Environmental Policy.

HISTORY / United States / 20th Century.

Wilderness areas

NATURE / Environmental Conservation & Protection.

New Deal, 1933-1939.

Conservation of natural resources