Silva, P. J. M. da; Horbe, A. M. C.; Horbe, M. A. Mineralogy and Geochemistry of Manganese Occurrences from Alto Tapajós Basin, Southeastern Amazonas State, Brazil. bcnaturais 2012, 7 (1), 11-28. https://doi.org/10.46357/bcnaturais.v7i1.603.