Columbia subject headings:
Bells--Conservation and restoration--France--Congresses.
Bells--Conservation and restoration--Switzerland--Congresses.
Church architecture--Conservation and restoration--France--Congresses.
Church architecture--Conservation and restoration--Switzerland--Congresses.
Church bells--Conservation and restoration--France--Congresses.
Church bells--Conservation and restoration--Switzerland--Congresses.
Harvard subject headings:
Bells--Conservation and restoration--France--Congresses.
Bells--Conservation and restoration--France.
Bells--Conservation and restoration--Switzerland--Congresses.
Bells--Switzerland.
Church architecture--Conservation and restoration--France--Congresses.
Church architecture--Conservation and restoration--France.
Church bells--Conservation and restoration--France--Congresses.
Church bells--Conservation and restoration--France.
Princeton subject headings: