@misc{indiciae56047fa85408,
  title = {Trace elements in coal: Environmental and health significance},
  author = {Robert B. Finkelman},
  year = {1999},
  doi = {10.1007/bf02784420},
  url = {https://pubs.usgs.gov/publication/70021789},
  note = {Source identifier: 70021789}
}