@misc{indiciaef7bc85a1df72,
  title = {Coal geology of the White Oak quadrangle, Magoffin and Morgan Counties, Kentucky},
  author = {Windsor Lester Adkison},
  year = {1957},
  doi = {10.3133/b1047a},
  url = {https://pubs.usgs.gov/publication/b1047A},
  note = {Source identifier: b1047A}
}