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Tài liệu tham khảo WikiPedia: Grzegorz Karnas http://polish-jazz.blogspot.com/2013/01/grzegorz-k... http://mak.bn.org.pl/cgi-bin/KHW/makwww.exe?BM=1&N... https://www.lesoir.be/art/le-scat-polonais-de-l-em... https://polish-jazz.blogspot.com/2017/12/grzegorz-... https://theculturetrip.com/europe/united-kingdom/e... https://catalogue.bnf.fr/ark:/12148/cb16705172j https://data.bnf.fr/ark:/12148/cb16705172j https://d-nb.info/gnd/1243590408 https://isni.org/isni/0000000130871016 https://musicbrainz.org/artist/dda82646-13d5-43f1-...
