Columbia subject headings:
Schmidt, Hans Thilo, 1888-1943.
Spies--France--Biography.
Spies--Germany--Biography.
World War, 1939-1945--Secret service--France.
Harvard subject headings:
Schmidt, Hans Thilo, 1888-1943.
Spies--France--Biography.
Spies--Germany--Biography.
World War, 1939-1945--Secret service--France.
Princeton subject headings:
Schmidt, Hans Thilo, 1888-1943.
Spies--France--Biography.
Spies--Germany--Biography.
World War, 1939-1945--Secret service--France.