@misc{indiciaef6cf01369a54,
  title = {Uranium in some rocks of Pennsylvanian age in Oklahoma, Kansas, and Missouri},
  author = {Harold Julius Hyden and Walter Danilchik},
  year = {1962},
  doi = {10.3133/b1147b},
  url = {https://pubs.usgs.gov/publication/b1147B},
  note = {Source identifier: b1147B}
}