@misc{indiciaeb3b67aea1c1e,
  title = {Areal extent, hydrogeologic characteristics, and possible origins of the carbonate rock Newburg Zone (Middle-Upper Silurian) in Ohio},
  author = {M.L. Strobel and E. F. Bugliosi},
  year = {1991},
  url = {https://pubs.usgs.gov/publication/70014979},
  note = {Source identifier: 70014979}
}