Columbia subject headings:
Civilization, Ancient--Congresses.
Public administration--History--Congresses.
Harvard subject headings:
Civilization, Ancient--Congresses
Public administration--History--Congresses.
Public administration--History--Sources--Congresses.
Seals (Numismatics)--Congresses.
Princeton subject headings:
Public administration--History--Congresses.
Public administration--History--Sources--Congresses.
Seals (Numismatics)--Congresses.