Hamburger Abendblatt 1969/č.142, str. 7: Büro-Terror durch Ptydepe
- Document's type: Press cutting
- Author: Walter Herrmann (Author)
- Date of origin: 23. června 1969
- Record's ID: 59252
Der Spiegel 1969/29, str. 96-98: Am Abgrund
- Document's type: Press cutting
- Date of origin: 16. 6. 1969
- Record's ID: 13883
Hamburger Abendblatt 1969/č.136, str. 22: In der Mühle Bürokratie
- Document's type: Press cutting
- Author: Mathes Rehder (Author)
- Date of origin: 14. června 1969
- Record's ID: 59253