@misc{indiciae2271593d8490,
  title = {Evaluation of natural and anthropogenic (human-made) hexavalent chromium},
  author = {John A. Izbicki and John G. Warden and Krishangi D. Groover and Whitney A. Seymour},
  year = {2023},
  doi = {10.3133/pp1885g},
  url = {https://pubs.usgs.gov/publication/pp1885G},
  note = {Source identifier: pp1885G}
}