23rd sonata in C minor
For piano. Caption title. Holograph (Ink). Corrections on inserts pasted throughout Caption: 13 Sept. 88 , margin of p. 5: 17 Sept. 88.
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Mus. Arc. 46, Box 6 Item 302
Uniform title: Sonatas, piano, no. 23, C minor
Alternate title: Twenty-third sonata in C minor
Praeger, Ferdinand, 1815-1891, “23rd sonata in C minor,” Digital Collections - University at Buffalo Libraries, accessed May 24, 2022, https://digital.lib.buffalo.edu/items/show/94568.