@misc{indiciaef137d7e7af9c,
  title = {Coal geology of the lower Youghiogheny coal field, Garrett County, Maryland},
  author = {Edwin F. Jacobsen and Paul C. Lyons},
  year = {1985},
  doi = {10.3133/coal101},
  url = {https://pubs.usgs.gov/publication/coal101},
  note = {Source identifier: coal101}
}