Columbia subject headings:
Netherlands--History--German occupation, 1940-1945.
World War, 1939-1945--Underground movements--Netherlands.
Harvard subject headings:
Netherlands--History--German occupation, 1940-1945.
World War, 1939-1945--Underground movements--Netherlands
Princeton subject headings:
Netherlands--History--German occupation, 1940-1945.
World War, 1939-1945--Underground movements--Netherlands.