Columbia subject headings:
Europe--Politics and government--1989-
European Union countries--Military policy.
European Union--Austria.
European Union.
National security--Europe.
Harvard subject headings:
Europe--Defenses.
European Security and Defense Policy.
European Union countries--Foreign relations.
European Union countries--Military policy.
European Union--Austria.
National security--European Union countries
Princeton subject headings:
Europe--Politics and government--1989-
European Union countries--Military policy.
European Union--Austria.
European Union.
National security--Europe.