Columbia subject headings:
Vizyēnos, G. M. (Geōrgios M.), 1849-1896--Congresses.
Harvard subject headings:
Vizyēnos, G. M. (Geōrgios M.), 1849-1896--Criticism and interpretation--Congresses.
Princeton subject headings:
Vizyēnos, G. M. (Geōrgios M.), 1849-1896--Criticism and interpretation--Congresses.