@misc{indiciae8ea4213e2717,
  title = {Determination of thorium and of rare earth elements in cerium earth minerals and ores},
  author = {M. K. Carron and D. L. Skinner and R.E. Stevens},
  year = {2002},
  doi = {10.1021/ac60103a006},
  url = {https://pubs.usgs.gov/publication/70010780},
  note = {Source identifier: 70010780}
}