Acta Congressus Madvigiani : Hafniae MDMLIV [sic] = Proceedings of the Second International Congress of Classical Studies. (E. Munksgaard, 1957)
English, French, German, and Italian.
"Published under the auspices of the International Federation of Associations for Classical Studies"--Verso t.p., v. 1.
Vol. 5 has imprint: Copenhagen : Nordisk Sprog- og Kulturforlag.