@misc{indiciae967d7feb1209,
  title = {Determination of minor elements in water by emission spectroscopy},
  author = {Paul R. Barnett and E. C. Mallory},
  year = {1971},
  doi = {10.3133/twri05a2},
  url = {https://pubs.usgs.gov/publication/twri05A2},
  note = {Source identifier: twri05A2}
}