| September 21, 2018 | Edited by Gustav-Landauer-Bibliothek Witten | merge authors |
| May 22, 2009 | Edited by EdwardBot | merge authors |
| September 4, 2008 | Edited by RenameBot | fix author name |
| April 1, 2008 | Created by an anonymous user | initial import |
| September 21, 2018 | Edited by Gustav-Landauer-Bibliothek Witten | merge authors |
| May 22, 2009 | Edited by EdwardBot | merge authors |
| September 4, 2008 | Edited by RenameBot | fix author name |
| April 1, 2008 | Created by an anonymous user | initial import |