Feska, Friedrich Ernst : Psalmen
| Louis Spohr an Nikolaus Simrock in Bonn | Kassel, Juli 1823 | 1823071521 |
| Louis Spohr an Friedrich Curschmann in Berlin | Kassel, Montag 30. November 1829 | 1829113014 |
| Louis Spohr an Nikolaus Simrock in Bonn | Kassel, Juli 1823 | 1823071521 |
| Louis Spohr an Friedrich Curschmann in Berlin | Kassel, Montag 30. November 1829 | 1829113014 |