"au" . "https://viaf.org/viaf/116719907" . "http://id.loc.gov/authorities/names/n82099689" . "https://www.wikidata.org/entity/Q2582055" . "MATTES, WILLY" . "MATTES, WILLY" . "https://data.muziekweb.nl/Link/M00000249264" . "https://musicbrainz.org/artist/3d17396d-cc9b-47f5-98b1-246340d1fc25" . "2002-07-30" . "https://www.discogs.com/artist/351666" . "19818" . "2002" . "componist" . "Mattes" . "http://data.beeldengeluid.nl/gtaa/262633" . . "1916" . "MATTES, WILLY" . "http://data.bibliotheken.nl/id/thes/p073143502" . . "1916-01-04" . "https://isni.org/isni/0000000081856759" . "Willy" .