@misc{indiciae2bb13ff26fd7,
  title = {Determination of arsenic in geologic materials using silver diethyldithiocarbamate},
  author = {Eric P. Welsch},
  year = {1979},
  doi = {10.3133/ofr791442},
  url = {https://pubs.usgs.gov/publication/ofr791442},
  note = {Source identifier: ofr791442}
}