@misc{indiciae38c7168bf6f8,
  title = {Geology and hydrology of the Piqua area, Ohio},
  author = {Stanley Eugene Norris and Andrew M. Spieker},
  year = {1961},
  doi = {10.3133/b1133a},
  url = {https://pubs.usgs.gov/publication/b1133A},
  note = {Source identifier: b1133A}
}