https://www.wbc.poznan.pl/dlibra/publication/423725/edition/337052/content?&ref=struct
Posener Tageblatt 1909.04.11 Jg.48 Nr169 - Wielkopolska Digital Library
tageblatt
https://www.wbc.poznan.pl/dlibra/publication/426426/edition/338424/content?&ref=struct
Posener Tageblatt 1900.04.10 Jg.39 Nr169 - Wielkopolska Digital Library
tageblatt