Henle Verlag Chopin Etüden op.10/op.25, Classical Sheet Music for Piano, Frédéric Chopin, Etudes, Urtext edition, Edited by Ewald Zimmermann, Fingering by Hermann Keller, Advanced level of difficulty, ISMN 9790201801247, publisher's no. HN 124, Format: 23.5 x 31 cm, Paperback, 136 Pages