Columbia subject headings:
Excavations (Archaeology)--Germany--Ruhr (Region)--Bibliography.
Excavations (Archaeology)--Germany--Ruhr (Region)--Congresses.
Funeral rites and ceremonies--Germany--Ruhr (Region)--History--Congresses.
Ruhr (Germany : Region)--Antiquities--Bibliography.
Ruhr (Germany : Region)--Antiquities--Congresses.
Harvard subject headings:
Excavations (Archaeology)--Germany--Ruhr (Region)--Bibliography.
Excavations (Archaeology)--Germany--Ruhr (Region)--Congresses.
Funeral rites and ceremonies--Germany--Ruhr (Region)--History--Congresses.
Ruhr (Germany : Region)--Antiquities--Bibliography.
Ruhr (Germany : Region)--Antiquities--Congresses.
Princeton subject headings:
Excavations (Archaeology)--Germany--Ruhr (Region)--Bibliography.
Excavations (Archaeology)--Germany--Ruhr (Region)--Congresses.
Funeral rites and ceremonies--Germany--Ruhr (Region)--History--Congresses.
Ruhr (Germany : Region)--Antiquities--Bibliography.
Ruhr (Germany : Region)--Antiquities--Congresses.