@misc{indiciae9f8df6aa56a8,
  title = {Arsenic-bearing pyrite and marcasite in the Fire Clay coal bed, Middle Pennsylvanian Breathitt Formation, eastern Kentucky},
  author = {L.F. Ruppert and J.C. Hower and C.F. Eble},
  year = {2005},
  doi = {10.1016/j.coal.2005.02.003},
  url = {https://pubs.usgs.gov/publication/70029543},
  note = {Source identifier: 70029543}
}