Columbia subject headings:
Austria--Foreign relations--Italy--Congresses.
Austria--Politics and government--20th century--Congresses.
Italy--Foreign relations--Austria--Congresses.
Italy--Politics and government--20th century--Congresses.
Harvard subject headings:
Austria--Foreign relations--Italy--Congresses.
Austria--Politics and government--20th century--Congresses.
Italy--Foreign relations--Austria--Congresses.
Italy--Politics and government--20th century--Congresses.
Princeton subject headings:
Austria--Foreign relations--Italy--Congresses.
Austria--Politics and government--20th century--Congresses.
Italy--Foreign relations--Austria--Congresses.
Italy--Politics and government--20th century--Congresses.