@misc{indiciaeaa0e3acc871b,
  title = {Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory-Comparison of a nitric acid in-bottle digestion procedure to other whole-water digestion procedures},
  author = {John R. Garbarino and Gerald L. Hoffman},
  year = {1999},
  doi = {10.3133/ofr9994},
  url = {https://pubs.usgs.gov/publication/ofr9994},
  note = {Source identifier: ofr9994}
}