@misc{indiciaeb416a89e3ad7,
  title = {Determination of selenium at trace levels in geologic materials by energy-dispersive X-ray fluorescence spectrometry},
  author = {J.S. Wahlberg},
  year = {1981},
  doi = {10.1016/0009-2541(81)90092-9},
  url = {https://pubs.usgs.gov/publication/70011746},
  note = {Source identifier: 70011746}
}