@misc{indiciaee0c47808a115,
  title = {Uranium and other trace elements in Devonian and Mississippian black shales in the central midcontinent area},
  author = {Edwin R. Landis},
  year = {1962},
  doi = {10.3133/b1107e},
  url = {https://pubs.usgs.gov/publication/b1107E},
  note = {Source identifier: b1107E}
}