@misc{indiciaebff2b71535e3,
  title = {Record of North American geology for 1887 to 1889, inclusive},
  author = {Nelson Horatio Darton},
  year = {1891},
  doi = {10.3133/b75},
  url = {https://pubs.usgs.gov/publication/b75},
  note = {Source identifier: b75}
}