@misc{indiciaed6c28ed3d037,
  title = {Copper-spark method for spectrochemical determination of strontium in water},
  author = {Marvin W. Skougstad},
  year = {1961},
  doi = {10.3133/wsp1496b},
  url = {https://pubs.usgs.gov/publication/wsp1496B},
  note = {Source identifier: wsp1496B}
}