Columbia subject headings:
Environmental policy--Great Britain--History--20th century.
Land use--Great Britain--Planning--History--20th century.
Harvard subject headings:
Environmental policy--Great Britain--History--20th century.
Land use--Great Britain--Planning--History--20th century.
Princeton subject headings:
Environmental policy--Great Britain--History--20th century.
Land use--Great Britain--Planning--History--20th century.