@misc{indiciae3c057b39dd85,
  title = {Geology and coal resources of the Salyersville North quadrangle, Magoffin, Morgan, and Johnson Counties, Kentucky},
  author = {Windsor Lester Adkison and J. E. Johnston},
  year = {1963},
  doi = {10.3133/b1047b},
  url = {https://pubs.usgs.gov/publication/b1047B},
  note = {Source identifier: b1047B}
}