Columbia subject headings:
Belgium--History--German occupation, 1940-1945--Sources.
Netherlands--History--German occupation, 1940-1945--Sources.
World War, 1939-1945--Belgium--Sources.
World War, 1939-1945--Luxembourg--Sources.
World War, 1939-1945--Netherlands--Sources.
Harvard subject headings:
Belgium--History--German occupation, 1940-1945--Sources.
Benelux countries--Politics and government--Sources.
Germany--Politics and government--1933-1945--Sources.
Netherlands--History--German occupation, 1940-1945--Sources.
World War, 1939-1945--Belgium--Sources.
World War, 1939-1945--Benelux countries--Sources.
World War, 1939-1945--Germany--Sources.
World War, 1939-1945--Luxembourg--Sources.
World War, 1939-1945--Netherlands--Sources.
World War, 1939-1945--Occupied territories--Sources.
Princeton subject headings:
Belgium--History--German occupation, 1940-1945--Sources.
Netherlands--History--German occupation, 1940-1945--Sources.
World War, 1939-1945--Belgium--Sources.
World War, 1939-1945--Luxembourg--Sources.
World War, 1939-1945--Netherlands--Sources.