Columbia subject headings:
Saint Petersburg (Russia)--Civilization--Congresses.
Saint Petersburg (Russia)--History--1917---Congresses.
Saint Petersburg (Russia)--History--To 1917--Congresses.
Saint Petersburg (Russia)--Intellectual life--Congresses.
Harvard subject headings:
Saint Petersburg (Russia)--Civilization--Congresses.
Saint Petersburg (Russia)--History--1917---Congresses.
Saint Petersburg (Russia)--History--To 1917--Congresses.
Saint Petersburg (Russia)--Intellectual life--Congresses.
Princeton subject headings:
Saint Petersburg (Russia)--Civilization--Congresses.
Saint Petersburg (Russia)--History--1917---Congresses.
Saint Petersburg (Russia)--History--To 1917--Congresses.
Saint Petersburg (Russia)--Intellectual life--Congresses.