Columbia subject headings:
Harvard subject headings:
Belgium--Antiquities--Congresses.
Europe--Antiquities--Congresses.
Hematite--Congresses.
Iron age--Belgium--Congresses.
Iron age--Europe--Congresses.
Mineral industries, Prehistoric--Europe--Congresses.
Mines and mineral resources, Prehistoric--Europe--Congresses.
Princeton subject headings:
Belgium--Antiquities--Congresses.
Conference papers and proceedings.
Europe--Antiquities--Congresses.
Hematite--Congresses.
Iron age--Belgium--Congresses.
Iron age--Europe--Congresses.
Mineral industries, Prehistoric--Europe--Congresses.
Mines and mineral resources, Prehistoric--Europe--Congresses.