@misc{indiciae8babbd48bef4,
  title = {Coal deposits of Pike County, Kentucky},
  author = {Charles Butler Hunt and Guy H. Briggs and Arthur Claude Munyan and G.R. Wesley},
  year = {1937},
  doi = {10.3133/b876},
  url = {https://pubs.usgs.gov/publication/b876},
  note = {Source identifier: b876}
}