Balada No. 1 em Sol menor, Op. 23 (Chopin) (Portuguese Wikipedia)

Analysis of information sources in references of the Wikipedia article "Balada No. 1 em Sol menor, Op. 23 (Chopin)" in Portuguese language version.

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6^th place

23^rd place

archive.org

Johannes Brahms im Briefwechsel mit Elisabet [sic] von Herzogenberg, hrsg. von Max Kalbeck, Band 1, Berlin 1908, S. 35 (Digitalisat)