Columbia subject headings:
Omsk (Russia)--History--Congresses.
Russia (Federation)--Civilization--Congresses.
Russia (Federation)--History--Congresses.
Russia (Federation)--Social conditions--Congresses.
Russia--Civilization--Congresses.
Harvard subject headings:
Omsk (Russia)--History--Congresses.
Russia (Federation)--Civilization--Congresses.
Russia (Federation)--History--Congresses.
Russia (Federation)--Social conditions--Congresses.
Russia--Civilization--Congresses.
Princeton subject headings:
Omsk (Russia)--History--Congresses.
Russia (Federation)--Civilization--Congresses.
Russia (Federation)--History--Congresses.
Russia (Federation)--Social conditions--Congresses.
Russia--Civilization--Congresses.