@misc{indiciaee8e704b2bdba,
  title = {North American geologic formation names: Bibliography, synonymy and distribution},
  author = {Fred Boughton Weeks},
  year = {1902},
  doi = {10.3133/b191},
  url = {https://pubs.usgs.gov/publication/b191},
  note = {Source identifier: b191}
}