SOBCZYŃSKI, M. Polish geographical survey of borders until 1945. Studia Geohistorica, [S. l.], n. 6, p. 70–79, 2019. DOI: 10.12775/SG.2018.05. Disponível em: https://apcz.umk.pl/AZMDDP/article/view/SG.2018.05. Acesso em: 3 lip. 2024.