Columbia subject headings:
Europe--History--20th century.
Europe--Politics and government--1918-1945.
United States--Politics and government--1933-1945.
World War, 1939-1945.
Harvard subject headings:
Europe--History--20th century.
Europe--Politics and government--1918-1945.
United States--Politics and government--1933-1945.
World War, 1939-1945.
Princeton subject headings:
Europe--History--20th century.
Europe--Politics and government--1918-1945.
United States--Politics and government--1933-1945.
World War, 1939-1945.