@misc{indiciae9ad78d0e5ee3,
  title = {The French Creek Mine: St. Peters, Chester County, Pennsylvania},
  author = {R. A. Sloto and L.L. Dickinson},
  year = {1994},
  url = {https://pubs.usgs.gov/publication/70018012},
  note = {Source identifier: 70018012}
}