André, Julius : Stücke, Org, op. 16
| Julius André an Louis Spohr in Kassel | Frankfurt am Main, Donnerstag 6. September 1838 | 1838090656 |
| Louis Spohr an Julius André in Frankfurt am Main | Kassel, Sonnabend 27. Oktober 1838 | 1838102726 |
| Julius André an Louis Spohr in Kassel | Frankfurt am Main, Donnerstag 6. September 1838 | 1838090656 |
| Louis Spohr an Julius André in Frankfurt am Main | Kassel, Sonnabend 27. Oktober 1838 | 1838102726 |