Columbia subject headings:
Books--Conservation and restoration--Congresses.
Paper--Preservation--Congresses.
Textile fabrics--Conservation and restoration--Congresses.
Harvard subject headings:
Books--Conservation and restoration--Congresses.
Paper--Preservation--Congresses
Textile fabrics--Conservation and restoration--Congresses.
Princeton subject headings:
Books--Conservation and restoration--Congresses.
Paper--Preservation--Congresses.
Textile fabrics--Conservation and restoration--Congresses.