@misc{indiciaeb373499b67fe,
  title = {Maps showing mines, prospects, and exposures in the Beaver Creek Wilderness, McCreary County, Kentucky},
  author = {Richard W. Hammack},
  year = {1986},
  doi = {10.3133/mf1348c},
  url = {https://pubs.usgs.gov/publication/mf1348C},
  note = {Source identifier: mf1348C}
}