| December 17, 2021 | Edited by dcapillae | merge authors |
| February 17, 2021 | Edited by Gustav-Landauer-Bibliothek Witten | (no) date of death |
| February 17, 2021 | Edited by Gustav-Landauer-Bibliothek Witten | merge authors |
| October 31, 2020 | Edited by Gustav-Landauer-Bibliothek Witten | merge authors |
| March 9, 2015 | Edited by bit | Edited without comment. |