@misc{indiciaeda0dc5688abe,
  title = {Determination of trace amounts of tin in geological materials by atomic absorption spectrometry},
  author = {E. P. Welsch and T. T. Chao},
  year = {1976},
  doi = {10.1016/s0003-2670(01)84611-0},
  url = {https://pubs.usgs.gov/publication/70010860},
  note = {Source identifier: 70010860}
}