@article{articlec8cfd216,
title   = {The Manganese deposits of Buritirama (Pará, Brazil)},
author = {Peters, Tj. and Valarelli, José Vicente and Coutinho, José Moacyr Vianna and Sommerauer, J. and Von Raumer, J.},
year = {1977},
journal   = {Schweizerische mineralogische und petrographische mitteilungen}
}