Columbia subject headings:
Elite (Social sciences)--Europe--History--Congresses.
Europe--Social life and customs--Congresses.
Leisure--Social aspects--Europe--Congresses.
Recreation--Europe--Congresses.
Harvard subject headings:
Elite (Social sciences)--Europe--History--Congresses.
Europe--Social life and customs--Congresses.
Leisure--Social aspects--Europe--Congresses.
Recreation--Europe--Congresses.
Princeton subject headings:
Leisure--Russia (Federation)--Volga River Region--Congresses.
Recreation--Europe--Congresses./.
Recreation--Russia (Federation)--Volga River Region--Congresses.