Impromptu No. 4 in A-Flat Major, Op. 90, D.899

歌曲	Impromptu No. 4 in A-Flat Major, Op. 90, D.899
歌手	Sylvia Čápová
歌手	Franz Schubert
专辑	Schubert: Four Impromptus, Op. 90, D.899 (Digitally Remastered)