| March 16, 2024 | Edited by Gustav-Landauer-Bibliothek Witten | merge authors |
| September 30, 2020 | Edited by MARC Bot | add ISNI |
| March 31, 2017 | Edited by MARC Bot | add VIAF and wikidata ID |
| May 16, 2012 | Edited by 192.109.50.227 | Added new photo |
| May 16, 2012 | Edited by 192.109.50.227 | Edited without comment. |