Universal classification I : subject analysis and ordering systems : proceedings 2026-02-16T01:40:08+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Dahlberg, Ingetraut (Studien zur Klassifikation ;, 1982)