@misc{indiciaefb99644357fd,
  title = {Radioactivity of some coal and shale of Pennsylvanian age in Ohio},
  author = {John L. Snider},
  year = {1953},
  doi = {10.3133/tei404},
  url = {https://pubs.usgs.gov/publication/tei404},
  note = {Source identifier: tei404}
}