Columbia subject headings:
World War, 1939-1945--Personal narratives, Swiss.
World War, 1939-1945--Secret service--Germany.
World War, 1939-1945--Secret service--Switzerland.
Harvard subject headings:
World War, 1939-1945--Personal narratives, Swiss.
Princeton subject headings:
World War, 1939-1945--Personal narratives, Swiss.
World War, 1939-1945--Secret service--Germany.
World War, 1939-1945--Secret service--Switzerland.