Columbia subject headings:
Poland--History--Revolution, 1830-1832--Foreign public opinion--Congresses.
Public opinion--Europe--Congresses.
Harvard subject headings:
Poland--History--Revolution, 1830-1832--Foreign public opinion--Congresses.
Public opinion--Europe--Congresses
Princeton subject headings:
Poland--History--Revolution, 1830-1832--Foreign public opinion--Congresses.
Public opinion--Europe--Congresses.