Columbia subject headings:
Former Soviet republics--Relations--Poland.
Poland--Relations--Former Soviet republics.
Poland--Relations--Russia.
Poland--Relations--Soviet Union.
Russia--Relations--Poland.
Soviet Union--Relations--Poland.
Harvard subject headings:
Former Soviet republics--Relations--Poland.
Poland--Relations--Former Soviet republics.
Poland--Relations--Ukraine--History.
Ukraine--Relations--Poland--History.
Princeton subject headings: