KALIŃSKI, J. Coal in Polish-Soviet economic relations. Journal of Humanities and Social Sciences, [S. l.], v. 20, n. 3, p. 93–112, 2021. DOI: 10.15584/johass.2021.3.6. Disponível em: https://journals.ur.edu.pl/jhss/article/view/7724. Acesso em: 20 may. 2024.