@misc{indiciaef806ba68db1c,
  title = {Report of the U.S. Geological Survey's analytical evaluation program; standard reference water samples M-86 (major constituents), T-87 (trace constituents), N-10 and N-11 (nutrients), P-5 (precipitation snowmelt), and POL-1 (priority pollutants)},
  author = {Victor J. Janzer and K.A. Latal},
  year = {1984},
  doi = {10.3133/ofr84128},
  url = {https://pubs.usgs.gov/publication/ofr84128},
  note = {Source identifier: ofr84128}
}