@misc{indiciae7463379ddb60,
  title = {Arsenic in coal},
  author = {Allan Kolker and Curtis A. Palmer and Linda J. Bragg and Joseph E. Bunnell},
  year = {2006},
  doi = {10.3133/fs20053152},
  url = {https://pubs.usgs.gov/publication/fs20053152},
  note = {Source identifier: fs20053152}
}