BEALS, Harold L. Manganese-Iron Concretions in Nova Scotia Lakes. Atlantic Geoscience, [S. l.], v. 2, n. 2, 1966. DOI: 10.4138/1487. Disponível em: https://journals.lib.unb.ca/index.php/ag/article/view/1487. Acesso em: 30 apr. 2024.