Columbia subject headings:
Lorraine (France)--History.
Saarland (Germany)--History.
Harvard subject headings:
Lorraine (France)--History--Congresses.
Luxembourg--History--Congresses.
Saarland (Germany)--History--Congresses.
Princeton subject headings:
Lorraine (France)--History--Congresses.
Luxembourg--History--Congresses.
Saarland (Germany)--History--Congresses.