@misc{indiciae2d8890e67f4f,
  title = {Illinoian outwash in southeastern Pennsylvania},
  author = {W.N. Lockwood and Harold Meisler},
  year = {1960},
  doi = {10.3133/b1121b},
  url = {https://pubs.usgs.gov/publication/b1121B},
  note = {Source identifier: b1121B}
}