Columbia subject headings:
Bettignies, Louise Marie Jeanne Henriette de, 1880-1918.
Women spies--France--Biography.
World War, 1914-1918--Secret service--France.
World War, 1914-1918--Underground movements--France--Lille.
Harvard subject headings:
Bettignies, Louise Marie Jeanne Henriette de, 1880-1918.
Women spies--France--Biography.
World War, 1914-1918--Secret service--France
World War, 1914-1918--Underground movements--France--Lille.
Princeton subject headings:
Bettignies, Louise Marie Jeanne Henriette de, 1880-1918.
Women spies--France--Biography.
World War, 1914-1918--Secret service--France.
World War, 1914-1918--Underground movements--France--Lille.