@misc{indiciae56ecf3019e2e,
  title = {Sources of geochemical standards-II},
  author = {F.J. Flanagan},
  year = {1970},
  doi = {10.1016/0016-7037(70)90155-9},
  url = {https://pubs.usgs.gov/publication/70009961},
  note = {Source identifier: 70009961}
}