Columbia subject headings:
Agricola, Georg, 1494-1555--Congresses.
Metallurgists--Germany--Biography--Congresses.
Mining engineers--Germany--Biography--Congresses.
Scientists--Germany--Biography--Congresses.
Harvard subject headings:
Agricola, Georg, 1494-1555--Congresses.
Metallurgists--Germany--Biography--Congresses.
Mining engineers--Germany--Biography--Congresses.
Scientists--Germany--Biography--Congresses.
Princeton subject headings:
Agricola, Georg, 1494-1555--Congresses.
Metallurgists--Germany--Biography--Congresses.
Mining engineers--Germany--Biography--Congresses.
Scientists--Germany--Biography--Congresses.