http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
2 volumes (1220 pages) : illustrations ; 25 cm.
"Colloquium ... held at Keszthely, Hungary from 28 June to 3 July 1976 ... organized by the Janos Bolyai Mathematical Society."
Colloquia mathematica Societatis János Bolyai ; 18