@misc{indiciaee9e3d8014f3b,
  title = {Further examination of the ragged edge of the Herrin coal bed, Webster County, Western Kentucky coal field},
  author = {J.C. Hower and D.A. Williams},
  year = {2001},
  doi = {10.1016/s0166-5162(01)00017-9},
  url = {https://pubs.usgs.gov/publication/70024019},
  note = {Source identifier: 70024019}
}