Columbia subject headings:
Great Britain--Politics and government--20th century.
Robson, William A. (William Alexander), 1895-1980.
Harvard subject headings:
Great Britain--Politics and government--20th century.
Great Britain--Politics and government.
Robson, William A. (William Alexander), 1895-1980.
Princeton subject headings:
Great Britain--Politics and government--20th century.
Robson, William A. (William Alexander), 1895-1980.