@misc{indiciae0eb1a18d87c5,
  title = {Statistical summary of geochemical data furnished by 146 laboratories for six geochemical exploration reference samples},
  author = {B. F. Arbogast and D.E. Detra and George VanTrump},
  year = {1987},
  doi = {10.3133/ofr87436},
  url = {https://pubs.usgs.gov/publication/ofr87436},
  note = {Source identifier: ofr87436}
}