@misc{indiciae7c0c1062a0fa,
  title = {Map of the First Berea sand in southeastern Ohio and western West Virginia},
  author = {James F. Pepper and Paul Averitt and D. F. Demarest and R.D. Holt and W. de Witt and H.H. Gray and H.H. Mead and C.W. Merrels and Violet Massarelli and Gail Everhart},
  year = {1944},
  doi = {10.3133/om9},
  url = {https://pubs.usgs.gov/publication/om9},
  note = {Source identifier: om9}
}