Columbia subject headings:
World War, 1939-1945--Norway.
World War, 1939-1945--Prisoners and prisons, German.
Harvard subject headings:
World War, 1939-1945--Norway.
World War, 1939-1945--Prisoners and prisons, German.
World War, 1939-1945--Underground movements--Norway.
Princeton subject headings:
World War, 1939-1945--Underground movements--Norway.