@misc{indiciae11db27fcdc1d,
  title = {Surficial geologic map of the Abiathar Peak and parts of adjacent quadrangles, Yellowstone National Park, Wyoming and Montana},
  author = {K. L. Pierce},
  year = {1974},
  doi = {10.3133/i646},
  url = {https://pubs.usgs.gov/publication/i646},
  note = {Source identifier: i646}
}