Columbia subject headings:
Harvard subject headings:
Archives--Italy--Tuscany--Congresses.
Tuscany (Italy)--Archival resources--Congresses.
Tuscany (Italy)--History--Sources--Congresses.
Princeton subject headings:
Archives--Italy--Tuscany--Congresses.
Tuscany (Italy)--Archival resources--Congresses.
Tuscany (Italy)--History--Sources--Congresses.