@misc{indiciaed6973bd72086,
  title = {Statistical summary of geochemical data furnished by 85 laboratories for for six geochemical exploration reference samples},
  author = {G.H. Allcott and H. W. Lakin},
  year = {1974},
  doi = {10.3133/ofr741003},
  url = {https://pubs.usgs.gov/publication/ofr741003},
  note = {Source identifier: ofr741003}
}