@misc{indiciae2ed7db0c7c2f,
  title = {Improved enrichment factor calculations through principal component analysis: Examples from soils near breccia pipe uranium mines, Arizona, USA},
  author = {Carleton R. Bern and Katherine Walton-Day and David L. Naftz},
  year = {2019},
  doi = {10.1016/j.envpol.2019.01.122},
  url = {https://pubs.usgs.gov/publication/70202590},
  note = {Source identifier: 70202590}
}