Columbia subject headings:
Diplomacy--History--20th century.
Europe--History--1918-1945.
League of Nations.
Lester, Sean, 1888-1959.
Harvard subject headings:
Princeton subject headings:
Diplomacy--History--20th century.
Diplomats--Ireland--Biography.
Europe--History--1918-1945.
League of Nations--Biography.
Lester, Sean, 1888-1959.