Columbia subject headings:
Art--Conservation and restoration--Italy--Congresses.
Secco Suardo, Giovanni, 1798-1873--Criticism and interpretation--Congresses.
Harvard subject headings:
Art--Conservation and restoration--Italy--Congresses.
Secco Suardo, Giovanni, 1798-1873--Criticism and interpretation--Congresses.
Princeton subject headings:
Art--Conservation and restoration--Italy--Congresses.
Secco Suardo, Giovanni, 1798-1873--Criticism and interpretation--Congresses.