4 Impromptus, Op. 90: Schirmer Library of Classics Volume 1125 Piano Solo

(Piano Collection). Contents: Impromptu in C minor, Op. 90, No. 1 * Impromptu in E—flat Major, Op. 90, No. 2 * Impromptu in G—flat Major, Op. 90, No. 3 * Impromptu in A—flat Major, Op. 90, No. 4