Columbia subject headings:
Books--Europe--History--Congresses.
Books--Italy--History--Congresses.
Scholarly publishing--Europe--History--Congresses.
Scholarly publishing--Italy--History--Congresses.
Textbooks--Europe--History--Congresses.
Textbooks--Italy--History--Congresses.
Harvard subject headings:
Books--Europe--History--Congresses.
Books--Italy--History--Congresses.
Scholarly publishing--Europe--History--Congresses.
Scholarly publishing--Italy--History--Congresses.
Textbooks--Europe--History--Congresses.
Textbooks--Italy--History--Congresses.
Princeton subject headings: