@misc{indiciaecfa83cbba743,
  title = {Age and correlation of the Chattanooga shale and the Maury formation},
  author = {W.H. Hass},
  year = {1956},
  doi = {10.3133/pp286},
  url = {https://pubs.usgs.gov/publication/pp286},
  note = {Source identifier: pp286}
}