@misc{indiciae6d61d39bed3e,
  title = {Geology and coal resources of Belmont County, Ohio},
  author = {Henry L. Berryhill},
  year = {1963},
  doi = {10.3133/pp380},
  url = {https://pubs.usgs.gov/publication/pp380},
  note = {Source identifier: pp380}
}