@misc{indiciae31f9af047461,
  title = {Spectrochemical study of gravimetric procedure for barium, strontium, and calcium},
  author = {P.R. Wilkinson and J.A. Gibson and A.J.W. Headlee},
  year = {1954},
  url = {https://pubs.usgs.gov/publication/70010703},
  note = {Source identifier: 70010703}
}