Columbia subject headings:
Harvard subject headings:
Broadsides--Italy--Rome--History--Congresses.
Cataloging of printed ephemera--Italy--Congresses.
Papal States--History--Sources--Congresses.
Printing--Italy--Rome--History--Congresses.
Proclamations--Italy--Rome--History--Congresses.
Princeton subject headings:
Conference papers and proceedings.
Italy--History--19th century--Sources--Congresses.
Italy--History--20th century--Sources--Congresses.
Pamphlets--Italy--History--19th century--Congresses.
Pamphlets--Italy--History--20th century--Congresses.
Street literature--Italy--19th century--History and criticism--Congresses.
Street literature--Italy--20th century--History and criticism--Congresses.