Columbia subject headings:
Harvard subject headings:
Austria--Foreign relations--21st century--Congresses.
Austria--Military policy--Congresses.
European Union countries--Foreign relations--21st century--Congresses.
European Union--Austria--Congresses.
National security--Austria--Congresses.
Princeton subject headings:
Austria--Foreign relations--21st century--Congresses.
Austria--Military policy--Congresses.
European Union countries--Foreign relations--21st century--Congresses.
European Union--Austria--Congresses.
National security--Austria--Congresses.