Müller, Uwe. “Die Gewerblichen Fortbildungsschulen in Den Provinzen Posen Und Westpreußen. Instrumente Der Polenpolitik, Vorreiter Des Staatsschulsystems Und Elemente Regionaler Entwicklungspolitik [The Commercial Training Schools in the Provinces of Posen and West Prussia. Instruments of Polish Policy, Pioneers of the State School System and Elements of Regional Development Policy]”. Studia Historiae Oeconomicae 27, no. 1 (June 1, 2009): 25–40. Accessed October 12, 2024. https://pressto.amu.edu.pl/index.php/sho/article/view/43992.