Columbia subject headings:
Sculpture, German--Conservation and restoration--Congresses.
Sculpture, Medieval--Conservation and restoration--Congresses.
Harvard subject headings:
Sculpture, German--Conservation and restoration--Congresses.
Sculpture, Medieval--Conservation and restoration--Congresses.
Sculpture, Medieval--Germany--Conservation and restoration--Congresses.
Princeton subject headings:
Sculpture, German--Conservation and restoration--Congresses.
Sculpture, Medieval--Conservation and restoration--Congresses.