"1879-02-23" . "au" . "Rudolf" . "1952" . "componist" . "https://www.wikidata.org/entity/Q376801" . "http://id.loc.gov/authorities/names/nr89004964" . "1952-05-05" . "SIECZYNSKI, RUDOLF" . "https://viaf.org/viaf/56804510" . "1879" . "https://imslp.org/wiki/Category:Sieczynski,_Rudolf" . "https://musicbrainz.org/artist/62bd99ed-a51f-4ae2-a43f-fbd808a0cedd" . "43461" . "https://data.muziekweb.nl/Link/M00000280138" . "https://isni.org/isni/0000000083849528" . . "SIECZYNSKI, RUDOLF |f [componist]" . "SIECZYNSKI, RUDOLF" . . "SieczyŃski" . "https://www.discogs.com/artist/696251" . "pl" .