@misc{indiciaec59aa5b88335,
  title = {Results of the U.S. Geological Survey's analytical evaluation program for standard reference samples; T-153 (trace constituents), M-146 (major constituents), N-57 (nutrient constituents), N-58 (nutrient constituents), P-30 (low ionic strength constituents), GWT-3 (ground-water trace constituents), GWM-3 (ground-water major constituents) and Hg-26 (mercury) distributed in April 1998},
  author = {Jerry W. Farrar},
  year = {1998},
  doi = {10.3133/ofr98391},
  url = {https://pubs.usgs.gov/publication/ofr98391},
  note = {Source identifier: ofr98391}
}