KOWALSKA, Alina. The Social Differentiation of the Polish Language of the Upper Silesia in the Second Half of the 19th Century. Forum Lingwistyczne, [S. l.], v. 6, n. 6, p. 125–136, 2019. DOI: 10.31261/FL.2019.06.09. Disponível em: https://journals.us.edu.pl/index.php/FL/article/view/8169. Acesso em: 5 grudz. 2025.