Columbia subject headings:
Harvard subject headings:
Bells--Italy--Congresses.
De Maria, Felice, 1778-1854--Congresses.
Foundry workers--Italy--Biography--Congresses.
Princeton subject headings:
Bells--Italy--Congresses.
De Maria, Felice, 1778-1854--Congresses.
Foundry workers--Italy--Biography--Congresses.