Columbia subject headings:
Harvard subject headings:
Archives--Conservation and restoration--Germany--Erfurt--Congresses.
Archives--Germany--Erfurt--Congresses.
Archives--Processing--Germany--Erfurt--Congresses.
Digital preservation--Germany--Erfurt--Congresses.
Princeton subject headings:
Archives--Conservation and restoration--Germany--Erfurt--Congresses.
Archives--Germany--Erfurt--Congresses.
Archives--Processing--Germany--Erfurt--Congresses.
Digital preservation--Germany--Erfurt--Congresses.