@misc{indiciae49900d4c2b9a,
  title = {Characteristics of radioactive carbonaceous and bituminous shales},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1950},
  doi = {10.3133/tei78},
  url = {https://pubs.usgs.gov/publication/tei78},
  note = {Source identifier: tei78}
}