Columbia subject headings:
Great Britain--Economic conditions--20th century.
Great Britain--Population--History--20th century.
Great Britain--Social conditions--20th century.
Natural resources--Great Britain--History--20th century.
Harvard subject headings:
Great Britain--Economic conditions--20th century.
Great Britain--Population--History--20th century.
Great Britain--Social conditions--20th century.
Natural resources--Great Britain--History--20th century.
Princeton subject headings:
Great Britain--Economic conditions--20th century.
Great Britain--Population--History--20th century.
Great Britain--Social conditions--20th century.
Natural resources--Great Britain--History--20th century.