Columbia subject headings:
Harvard subject headings:
Deutsche Gesellschaft für Metallkunde--History--20th century--Congresses.
Germany--History--Unification, 1990--Congresses.
Materials science--Germany--History--20th century--Congresses.
Materials scientists--Germany--History--20th century--Congresses.
Princeton subject headings:
Deutsche Gesellschaft für Metallkunde--History--20th century--Congresses.
Germany--History--Unification, 1990--Congresses.
Materials science--Germany--History--20th century--Congresses.
Materials scientists--Germany--History--20th century--Congresses.