@misc{indiciaef482ea6af17f,
  title = {Mineral resource potential map of the Clarion River Roadless Area, Elk County, Pennsylvania},
  author = {S. P. Schweinfurth and Wallace De Witt and R. A. Welsh and P. T. Behum},
  year = {1983},
  doi = {10.3133/mf1444b},
  url = {https://pubs.usgs.gov/publication/mf1444B},
  note = {Source identifier: mf1444B}
}