@misc{indiciae508f47e2f5d1,
  title = {Eastern black shale reconnaissance preliminary report},
  author = {Archibald L. Slaughter and Stephen Edmund Clabaugh},
  year = {1944},
  doi = {10.3133/tei1},
  url = {https://pubs.usgs.gov/publication/tei1},
  note = {Source identifier: tei1}
}