@misc{indiciae1d9c841cac8d,
  title = {Lithofacies and stratigraphic nomenclature of part of the Upper Ordovician section of Kentucky},
  author = {G. W. Weir and W. L. Peterson and W. C. Swadley},
  year = {1979},
  doi = {10.3133/i1155},
  url = {https://pubs.usgs.gov/publication/i1155},
  note = {Source identifier: i1155}
}