@article{Kowalska_2019, title={The Social Differentiation of the Polish Language of the Upper Silesia in the Second Half of the 19th Century}, volume={6}, url={https://journals.us.edu.pl/index.php/FL/article/view/8169}, DOI={10.31261/FL.2019.06.09}, number={6}, journal={Forum Lingwistyczne}, author={Kowalska, Alina}, year={2019}, month={grudz.}, pages={125-136} }