Columbia subject headings:
Harvard subject headings:
Germany--Foreign relations--1990-
Germany--History--Unification, 1990.
Germany--Military policy.
National security--Germany
North Atlantic Treaty Organization--Membership--Political aspects--Europe, Eastern.
North Atlantic Treaty Organization--Membership.
Princeton subject headings:
Germany--Foreign relations--1990-
Germany--History--Unification, 1990.
Germany--Military policy.
National security--Germany.
North Atlantic Treaty Organization--Membership.