Columbia subject headings:
Harvard subject headings:
Europe--Foreign relations--Poland.
North Atlantic Treaty Organization--Membership.
North Atlantic Treaty Organization--Poland.
Poland--Foreign relations--Europe
Princeton subject headings:
Europe--Foreign relations--Poland.
North Atlantic Treaty Organization--Membership.
North Atlantic Treaty Organization--Poland.
Poland--Foreign relations--1945-1980.
Poland--Foreign relations--1980-1989.
Poland--Foreign relations--1989-
Poland--Foreign relations--Europe.
Security, International.