ZABŁOCKI, Sebastian. Changes of the groundwater quality threat of main useful aquifer by nitrates from agricultural sources. Bulletin of Geography. Physical Geography Series, [S. l.], n. 9, p. 45–53, 2015. DOI: 10.2478/5031. Disponível em: https://apcz.umk.pl/BOGPGS/article/view/5031. Acesso em: 21 jan. 2026.