Columbia subject headings:
Harvard subject headings:
Einkem, Marie Alžběta von, 1902 or 1903-1942.
Spies--Germany--Biography.
World War, 1939-1945--Secret service--Germany.
Princeton subject headings:
Einkem, Marie Alžběta von, 1902 or 1903-1942.
Spies--Germany--Biography.
World War, 1939-1945--Secret service--Germany.