DAVID, R.; KOHFAHL, C.; REBOLLO, A.; RUIZ, F. Quality aspects of the Doñana groundwater resources (SW-Spain) before the intensification of agriculture. Boletín Geológico y Minero, [S. l.], v. 131, n. 4, p. 757–773, 2020. DOI: 10.21701/bolgeomin.131.4.014. Disponível em: https://bgm.revistas.csic.es/index.php/bgm/article/view/101. Acesso em: 3 may. 2025.