Columbia subject headings:
Harvard subject headings:
European Union countries--Foreign relations--21st century.
Former Soviet republics--Foreign relations--Poland.
Poland--Foreign relations--1989-
Poland--Foreign relations--Former Soviet republics.
Princeton subject headings:
European Union countries--Foreign relations--21st century.
Former Soviet republics--Foreign relations--Poland.
Poland--Foreign relations--1989-
Poland--Foreign relations--Former Soviet republics.