Columbia subject headings:
Nobility--Legal status, laws, etc.--Russia--Congresses.
Nobility--Russia--History--Congresses.
Titles of honor and nobility--Law and legislation--Russia--Congresses.
Harvard subject headings:
Nobility--Legal status, laws, etc.--Russia--Congresses.
Nobility--Russia--History--Congresses.
Titles of honor and nobility--Law and legislation--Russia--Congresses.
Princeton subject headings:
Nobility--Legal status, laws, etc.--Russia--Congresses.
Nobility--Russia--History--Congresses.
Titles of honor and nobility--Law and legislation--Russia--Congresses.