@misc{indiciae526588915209,
  title = {Locations and descriptions of mineralized rock samples from Mississippi Valley-type lead-zinc occurrences in central Pennsylvania},
  author = {S. S. Howe},
  year = {1988},
  doi = {10.3133/ofr88250},
  url = {https://pubs.usgs.gov/publication/ofr88250},
  note = {Source identifier: ofr88250}
}