@misc{indiciae84b3c77a3feb,
  title = {Measured sections of Ordovician strata in Indiana and Ohio},
  author = {Gordon Whitney Weir and Warren Lee Peterson and W. C. Swadley},
  year = {1980},
  doi = {10.3133/ofr80235},
  url = {https://pubs.usgs.gov/publication/ofr80235},
  note = {Source identifier: ofr80235}
}