Media type: E-Article Title: Piano Sonata in B Flat, Op. Posth.; Impromptu in A Flat, Op. 142 No. 2 Contributor: Sams, Eric; Curzon, Clifford; Schubert imprint: JSTOR, 1974 Published in: The Musical Times Language: Not determined DOI: 10.2307/957977 ISSN: 0027-4666 Keywords: Music Origination: Footnote: