@misc{indiciaecd2d54ac0f79,
  title = {Mineral resource potential maps of the Allegheny Front and Hickory Creek Roadless Areas, Warren County Pennsylvania},
  author = {S. P. Schweinfurth and Wallace De Witt and V. P. Girol},
  year = {1983},
  doi = {10.3133/mf1442b},
  url = {https://pubs.usgs.gov/publication/mf1442B},
  note = {Source identifier: mf1442B}
}