@misc{indiciae73785c24b895,
  title = {Determination of sodium and potassium in water using the Perkin-Elmer flame photometer, model 52A},
  author = {W.L. Lamar and L.B. Laird},
  year = {1952},
  doi = {10.3133/ofr5289},
  url = {https://pubs.usgs.gov/publication/ofr5289},
  note = {Source identifier: ofr5289}
}