Columbia subject headings:
Austria--Foreign relations--Turkey--Congresses.
Burgenland (Austria)--History--Congresses.
Slavs, Southern--History--Congresses.
Turkey--Foreign relations--Austria--Congresses.
Harvard subject headings:
Austria--Foreign relations--Turkey--Congresses.
Burgenland (Austria)--History--Congresses.
Slavs, Southern--History--Congresses.
Turkey--Foreign relations--Austria--Congresses.
Princeton subject headings:
Austria--Foreign relations--Turkey--Congresses.
Burgenland (Austria)--History--Congresses.
Slavs, Southern--History--Congresses.
Turkey--Foreign relations--Austria--Congresses.