Columbia subject headings:
Harvard subject headings:
Burgenland (Austria)--History--20th century--Congresses.
Burgenland (Austria)--History--21st century--Congresses.
Burgenland (Austria)--Politics and government--20th century--Congresses.
Burgenland (Austria)--Politics and government--21st century--Congresses.
Princeton subject headings:
Burgenland (Austria)--History--20th century--Congresses.
Burgenland (Austria)--History--21st century--Congresses.
Burgenland (Austria)--Politics and government--20th century--Congresses.
Burgenland (Austria)--Politics and government--21st century--Congresses.