@misc{indiciaeb34b99dc93e9,
  title = {Test drilling for coal in 1982-83 in the Jefferson National Forest, Virginia; Part 2, Analyses of coal cores from the southwestern Virginia coal field},
  author = {Frederick Otto Simon and Kenneth John Englund},
  year = {1983},
  doi = {10.3133/ofr83620},
  url = {https://pubs.usgs.gov/publication/ofr83620},
  note = {Source identifier: ofr83620}
}