@misc{indiciaea7d6375b3655,
  title = {Geologic map of the New Amsterdam quadrangle, Kentucky-Indiana and part of the Mauckport quadrangle, Kentucky},
  author = {Dewey Harold Amos},
  year = {1972},
  doi = {10.3133/gq990},
  url = {https://pubs.usgs.gov/publication/gq990},
  note = {Source identifier: gq990}
}