Columbia subject headings:
Historiography--Germany--Congresses.
Historiography--Italy--Congresses.
Rome--Historiography--Congresses.
Harvard subject headings:
Historiography--Germany--Congresses.
Historiography--Italy--Congresses.
Rome--Historiography--Congresses.
Princeton subject headings:
Historiography--Germany--Congresses.
Historiography--Italy--Congresses.
Rome--Historiography--Congresses.