@misc{indiciaee8a5326d82e7,
  title = {Notes on the manganese ores of Brazil},
  author = {C. F. Park and J. V. N. Dorr and P. W. Guild and A. L. M. Barbosa},
  year = {1951},
  doi = {10.2113/gsecongeo.46.1.1},
  url = {https://pubs.usgs.gov/publication/70207423},
  note = {Source identifier: 70207423}
}