Columbia subject headings:
Harvard subject headings:
Excavations (Archaeology)--Congresses
Gold mines and mining, Prehistoric--Congresses.
Gold--Metallurgy--History--Congresses.
Goldwork, Prehistoric--Congresses.
Metallurgy in archaeology--History--Congresses.
Silver mines and mining--History--Congresses.
Silver--Metallurgy--History--Congresses.
Princeton subject headings:
Excavations (Archaeology)--Congresses.
Gold mines and mining, Prehistoric--Congresses.
Gold--Metallurgy--History--Congresses.
Goldwork, Prehistoric--Congresses.
Metallurgy in archaeology--History--Congresses.
Silver mines and mining--History--Congresses.
Silver--Metallurgy--History--Congresses.