Columbia subject headings:
Europe--Politics and government--1989-
European Union countries--Foreign relations--United States.
Security, International.
United States--Foreign relations--European Union countries.
Harvard subject headings:
Europe--Politics and government--1989-
European Union countries--Foreign relations--United States.
Security, International.
United States--Foreign relations--European Union countries.
Princeton subject headings:
Europe--Politics and government--1989-
European Union countries--Foreign relations--United States.
Security, International.
United States--Foreign relations--European Union countries.