Szymańska, Daniela, Jadwiga Biegańska, and Anna Gil. “Rural Areas in Poland in The Context of Changes in Population Age Structure in 1996, 2001 and 2006”. Bulletin of Geography. Socio-economic Series, no. 12 (December 1, 2009): 91–107. Accessed February 6, 2023. https://apcz.umk.pl/BGSS/article/view/v10089-009-0006-1.