VILLUMSEN, A.; JACOBSEN, J. Mapping of hydrochemical data by computer at the Geological Survey of Denmark. Danmarks Geologiske Undersøgelse III. Række, [S. l.], v. 46, p. 1–26, 1977. DOI: 10.34194/raekke3.v46.6951. Disponível em: https://geusjournals.org/index.php/raekke3/article/view/6951. Acesso em: 5 may. 2024.