Columbia subject headings:
Boothby, Robert John Graham, Baron, 1900-1986.
Europe--Politics and government--1918-1945.
Great Britain--Politics and government--20th century.
World politics.
Harvard subject headings:
Boothby, Robert John Graham, 1900-
Boothby, Robert John Graham, Baron, 1900-1986
Europe--Politics and government--1918-1945.
Great Britain--Politics and government--20th century.
World politics
Princeton subject headings: