Nelson Freire /
Schubert /
Impromptu No. 4 in A-Flat Major, D. 899
April 17 - 19, 1967 in Winterthur - Kirchgemeindehaus
- ( 1 CD ) Sony 88697740542
- ( 1 CD ) Sony SBK 47 667
- ( 1 CD ) Sony SBK 47 667 EU