ĆWIĘK, H. Purpose – to recognize Germany. About some activities of the Polish intelligence in the 1920s. Historia i Świat, [S. l.], v. 10, p. 353–363, 2021. DOI: 10.34739/his.2021.10.17. Disponível em: https://czasopisma.uph.edu.pl/historiaswiat/article/view/2564. Acesso em: 2 maj. 2024.