Columbia subject headings:
Civil rights--European Union countries.
Human rights--European Union countries.
Internal security--European Union countries.
Terrorism--European Union countries--Prevention.
Harvard subject headings:
Human rights--European Union countries
Terrorism--Prevention
Terrorism--Prevention--Law and legislation
Terrorism--Prevention--Law and legislation--European Union countries.
Princeton subject headings:
Human rights--European Union countries.
National security--Law and legislation--European Union countries.
Terrorism--European Union countries--Prevention.