Columbia subject headings:
Slovenes--Austria--Graz--History--19th century--Congresses.
Slovenes--Austria--Graz--History--20th century--Congresses.
Harvard subject headings:
Slovenes--Austria--Graz--History--19th century--Congresses.
Slovenes--Austria--Graz--History--20th century--Congresses.
Princeton subject headings: