@misc{indiciaefeee1dadc5f9,
  title = {Results of the U.S. Geological Survey's analytical evaluation program for standard reference samples distributed in October 1999},
  author = {T.W. Farrar},
  year = {2000},
  doi = {10.3133/ofr00227},
  url = {https://pubs.usgs.gov/publication/ofr00227},
  note = {Source identifier: ofr00227}
}