@misc{indiciae966cd4857eb2,
  title = {Radioactivity of part of the bituminous coal region of Pennsylvania},
  author = {E. D. Patterson},
  year = {1954},
  doi = {10.3133/tei479},
  url = {https://pubs.usgs.gov/publication/tei479},
  note = {Source identifier: tei479}
}