@misc{indiciae906bd9aabce5,
  title = {Map of the Berea sand of southeastern Ohio, northern West Virginia, and southwestern Pennsylvania},
  author = {James F. Pepper and D. F. Demarest and R.D. Holt and C.W. Merrels and G.M. Everhart and M.E. Galpin and V.M. Massarelli and G.E. Saam},
  year = {1945},
  doi = {10.3133/om29},
  url = {https://pubs.usgs.gov/publication/om29},
  note = {Source identifier: om29}
}