@misc{indiciaec530a8a6c861,
  title = {Results of the U. S. Geological Survey's Analytical Evaluation Program for Standard Reference Samples Distributed in March 2002},
  author = {M.T. Woodworth and B.F. Conner},
  year = {2002},
  doi = {10.3133/ofr02243},
  url = {https://pubs.usgs.gov/publication/ofr02243},
  note = {Source identifier: ofr02243}
}