Columbia subject headings:
Harvard subject headings:
Austria--Civilization--Congresses.
Austria--Relations--Balkan Peninsula--Congresses.
Austrian literature--History and criticism--Congresses
Balkan Peninsula--Civilization--Congresses.
Balkan Peninsula--In literature--Congresses.
Balkan Peninsula--Relations--Austria--Congresses.
Balkan literature--History and criticism--Congresses.
Princeton subject headings:
Austria--Civilization.
Balkan Peninsula--Civilization.
Balkan literature--History and criticism.
German literature--Austria--History and criticism.