HEFFNER, K.; SOLGA, B. Features of a migration region – an analysis using the example of the Opolskie Voivodship. Bulletin of Geography. Socio-economic Series, [S. l.], n. 20, p. 43–58, 2013. DOI: 10.1515/bog-2013-0010. Disponível em: https://apcz.umk.pl/BGSS/article/view/bog-2013-0010. Acesso em: 27 apr. 2024.