Title: Ark II; social response to environmental imperatives
Subjects: Social conditions, Politics and government, Economic conditions, Environmental policy, United states, economic conditions, 1971-1981, United states, social conditions, 1960-, Environmental policy, united states, United states, politics and government, 1969-1974
Places: United States
Time periods: 1969-1974, 1971-1981, 1960-1980, 1960-, 1961-, 1969-