@misc{indiciae1f35aef59a9c,
  title = {Sampling considerations in trace element analysis.},
  author = {S Narayanan and F C Lin and H J Walder},
  year = {1986},
  doi = {10.1111/j.1600-0773.1986.tb02834.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/3776633/},
  note = {Source identifier: 3776633}
}