Columbia subject headings:
Europe--Commerce--Russia--History.
Merchants--Russia--History--Sources.
Russia--Commerce--History.
Harvard subject headings:
Europe--Commerce--Russia--History.
Merchants--Russia--History--Sources.
Russia--Commerce--History--Congresses.
Princeton subject headings:
Europe--Commerce--Russia--History--Congresses.
Europe--Economic conditions--Congresses.
Merchants--Russia--History--Congresses.
Russia--Commerce--Europe--History--Congresses.
Russia--Economic conditions--To 1861--Congresses.