Etuden Etudes - Chopin, Fryderyk Franciszek 1810-1849; Zimmermann, Ewald 1910-1998; Keller, Hermann 1885-1967 (Munchen G. Henle Verlag, 1983)
Opus 10 -- Opus 25 -- Drei Etüden KK IIb Nr. 3.
"Urtext"--Cover.
Preface in German, English, and French; comments in German and English.
Keywords: Canons, fugues, etc. (Piano) -- Scores