$a Première ballade / F. Chopin. - New York, London [między 1900 i 1910]. $b Redakcja (Na okładce: Chopin's Pianoforte Works : Reprinted from the celebrated russian publication, which was revised, fingered, and carefully corrected after the parisian, english, and german editions by Carl Klindworth : The final revise by Xaver Scharwenka)