@misc{indiciaeccd24fae7cb9,
  title = {Regolith in the Piedmont Upland Section, Piedmont Province, York, Lancaster, and Chester Counties, southeastern Pennsylvania},
  author = {W. D. Sevon},
  year = {2000},
  url = {https://pubs.usgs.gov/publication/70023167},
  note = {Source identifier: 70023167}
}