@misc{indiciaee74fbd7696c9,
  title = {Manganese dioxide causes spurious gold values in flame atomic-absorption readings from HBr-Br2 digestions},
  author = {W. L. Campbell},
  year = {1981},
  doi = {10.1016/0375-6742(81)90090-x},
  url = {https://pubs.usgs.gov/publication/70011732},
  note = {Source identifier: 70011732}
}