@misc{indiciaed037b1c79ff6,
  title = {Map of the First and Second Berea sands of southeastern Ohio and western West Virginia},
  author = {Wallace De Witt},
  year = {1947},
  doi = {10.3133/om79},
  url = {https://pubs.usgs.gov/publication/om79},
  note = {Source identifier: om79}
}