@misc{indiciaef2c2c1760d8b,
  title = {Spectrochemical determination of submicrogram amounts of tungsten in geologic materials},
  author = {Reinhard W. Leinz and David J. Grimes},
  year = {1978},
  url = {https://pubs.usgs.gov/publication/70233041},
  note = {Source identifier: 70233041}
}