@misc{indiciae23cef7322159,
  title = {The oil fields of Allen County, Kentucky, with notes on the oil geology of adjoining counties},
  author = {Eugene Wesley Shaw and Kirtley F. Mather},
  year = {1919},
  doi = {10.3133/b688},
  url = {https://pubs.usgs.gov/publication/b688},
  note = {Source identifier: b688}
}