Columbia subject headings:
Gold mines and mining, Prehistoric--Congresses.
Gold mines and mining--Congresses.
Goldwork, Ancient--Congresses.
Goldwork, Prehistoric--Congresses.
Harvard subject headings:
Princeton subject headings:
Gold mines and mining, Prehistoric--Congresses.
Gold mines and mining--Congresses.
Goldwork, Ancient--Congresses.
Goldwork, Prehistoric--Congresses.