Columbia subject headings:
World War, 1939-1945--Belgium.
World War, 1939-1945--Diplomatic history.
World War, 1939-1945--Netherlands.
Harvard subject headings:
World War, 1939-1945--Belgium.
World War, 1939-1945--Diplomatic history.
World War, 1939-1945--Netherlands.
Princeton subject headings:
World War, 1939-1945--Belgium.
World War, 1939-1945--Diplomatic history.
World War, 1939-1945--Netherlands.