@misc{indiciae109d784ecae8,
  title = {Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory-Determination of chromium in water by graphite furnace atomic absorption spectrophotometry},
  author = {B.J. McLain},
  year = {1993},
  doi = {10.3133/ofr93449},
  url = {https://pubs.usgs.gov/publication/ofr93449},
  note = {Source identifier: ofr93449}
}