Columbia subject headings:
Nord (France : Department)--History--20th century--Sources--Bibliography.
World War, 1914-1918--France--Nord (Department)--Sources--Bibliography.
Harvard subject headings:
Nord (France : Department)--History--20th century--Sources--Bibliography.
Nord-Pas-de-Calais (France)--History--20th century--Sources--Bibliography.
World War, 1914-1918--France--Nord (Department)--Sources--Bibliography.
World War, 1914-1918--France--Nord-Pas-de-Calais--Sources--Bibliography.
Princeton subject headings:
Nord (France : Dept.)--History--20th century--Sources--Bibliography.
World War, 1914-1918--France--Nord (Dept.)--Sources--Bibliography.