Columbia subject headings:
Korf, Modest Andreevich, graf, 1800-1876--Congresses.
Rossiĭskai︠a︡ nat︠s︡ionalʹnai︠a︡ biblioteka. Otdelenie Rossika--Anniversaries, etc.--Congresses.
Rossiĭskai︠a︡ nat︠s︡ionalʹnai︠a︡ biblioteka. Otdelenie Rossika--History--Congresses.
Harvard subject headings:
Imperatorskai͡a publichnai͡a biblīoteka (Saint Petersburg, Russia)--Anniversaries, etc--Congresses.
Imperatorskai͡a publichnai͡a biblīoteka (Saint Petersburg, Russia)--History--Congresses.
Korf, Modest Andreevich, graf, 1800-1876--Congresses.
Rossika--History--Congresses.
Princeton subject headings:
Imperatorskai︠a︡ publichnai︠a︡ biblīoteka (Saint Petersburg, Russia)--Anniversaries, etc--Congresses.
Imperatorskai︠a︡ publichnai︠a︡ biblīoteka (Saint Petersburg, Russia)--History--Congresses.
Korf, Modest Andreevich, graf, 1800-1876--Congresses.
Rossika--History--Congresses.