@misc{indiciae1ddd2fc328e4,
  title = {Arsenic, cadmium, lead, and zinc in the Danville and Springfield coal members (Pennsylvanian) from Indiana},
  author = {Maria Mastalerz and A. Drobniak},
  year = {2007},
  doi = {10.1016/j.coal.2006.05.005},
  url = {https://pubs.usgs.gov/publication/70030156},
  note = {Source identifier: 70030156}
}