@misc{indiciae4afc7864a588,
  title = {Stratigraphy of the Chattanooga Shale (Upper Devonian and Lower Mississippian) in vicinity of Big Stone Gap, Wise County, Virginia, with a section on petrology},
  author = {Roy Clark Kepferle and Paul Edwin Potter and Wayne Arthur Pryor and T.V. Stenbeck},
  year = {1981},
  doi = {10.3133/b1499},
  url = {https://pubs.usgs.gov/publication/b1499},
  note = {Source identifier: b1499}
}