Columbia subject headings:
Europe--Foreign relations--United States.
Europe--Politics and government--1945-
North Atlantic Treaty Organization.
United States--Foreign relations--Europe.
Harvard subject headings:
Europe--Foreign relations--United States.
Europe--Politics and government--1945-
North Atlantic Treaty Organization
United States--Foreign relations--Europe.
Princeton subject headings:
Europe--Foreign relations--United States.
Europe--Politics and government--1945-
North Atlantic Treaty Organization.
United States--Foreign relations--Europe.