Columbia subject headings:
France--History--German occupation, 1940-1945.
Nord-Pas-de-Calais (France)--History--20th century.
World War, 1939-1945--Underground movements--France--Nord-Pas-de-Calais.
Harvard subject headings:
France--History--German occupation, 1940-1945.
Nord-Pas-de-Calais (France)--History--20th century.
World War, 1939-1945--Underground movements--France--Nord-Pas-de-Calais.
Princeton subject headings:
France--History--German occupation, 1940-1945.
Nord-Pas-de-Calais (France)--History--20th century.
World War, 1939-1945--Underground movements--France--Nord-Pas-de-Calais.