Columbia subject headings:
Harvard subject headings:
Borderlands--Austria--Styria--History--20th century.
Borderlands--Slovenia--History--20th century.
Slovenia--Boundaries--Austria--Styria.
Styria (Austria)--Boundaries--Slovenia.
Princeton subject headings:
Borderlands--Austria--Styria--History--20th century.
Borderlands--Slovenia--History--20th century.
Slovenia--Boundaries--Austria--Styria.
Styria (Austria)--Boundaries--Slovenia.