@misc{indiciae214d6df1f7d4,
  title = {Naturally occurring radionuclides in the ground water of southeastern Pennsylvania},
  author = {Ronald A. Sloto},
  year = {2000},
  doi = {10.3133/fs01200},
  url = {https://pubs.usgs.gov/publication/fs01200},
  note = {Source identifier: fs01200}
}