Columbia subject headings:
Europe--Relations--Russia (Federation)--Congresses.
Poland--Relations--Russia (Federation)--Congresses.
Russia (Federation)--Relations--Europe--Congresses.
Russia (Federation)--Relations--Poland--Congresses.
Harvard subject headings:
Europe--Relations--Russia (Federation)--Congresses.
Poland--Relations--Russia (Federation)--Congresses.
Russia (Federation)--Relations--Europe--Congresses.
Russia (Federation)--Relations--Poland--Congresses.
Princeton subject headings: