Columbia subject headings:
Artois (France)--History.
Pas-de-Calais (France)--History--Sources--Bibliography--Catalogs.
Pas-de-Calais (France). Archives départementales--Catalogs.
Pas-de-Calais (France). Archives départementales--Handbooks, manuals, etc.
World War, 1914-1918--France--Pas-de-Calais.
Harvard subject headings:
Pas-de-Calais (France)--History--Sources.
World War, 1914-1918--France--Pas-de-Calais (Department)--Sources.
Princeton subject headings:
Artois (France)--History.
Pas-de-Calais (France)--History--Sources--Bibliography--Catalogs.
Pas-de-Calais (France). Archives départementales--Catalogs.
Pas-de-Calais (France). Archives départementales--Handbooks, manuals, etc.
World War, 1914-1918--France--Pas-de-Calais (Dept.).