Columbia subject headings:
Environmental policy--History--20th century.
Science and state--History--20th century.
Technology and state--History--20th century.
Harvard subject headings:
Environmental policy--History--20th century.
Science and state--History--20th century.
Technology and state--History--20th century.
Princeton subject headings:
Environmental policy--History--20th century.
Science and state--History--20th century.
Technology and state--History--20th century.