@misc{indiciae61c2b7446bb7,
  title = {Geologic map of the Allegheny Front and Hickory Creek Roadless Areas, Warren County, Pennsylvania},
  author = {S. P. Schweinfurth and N. L. Hickling and M.A. Person},
  year = {1982},
  doi = {10.3133/mf1442a},
  url = {https://pubs.usgs.gov/publication/mf1442A},
  note = {Source identifier: mf1442A}
}