@misc{indiciaee099ecfacaf6,
  title = {Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory-Determination of low-level silver by graphite furnace atomic absorption spectrophotometry},
  author = {D.L. Damrau},
  year = {1993},
  doi = {10.3133/ofr93416},
  url = {https://pubs.usgs.gov/publication/ofr93416},
  note = {Source identifier: ofr93416}
}