@misc{indiciae7f3c4d52fe71,
  title = {Geologic map of the Frank Island quadrangle, Yellowstone National Park, Wyoming},
  author = {H. Richard Blank and Harold J. Prostka and William R. Keefer and Robert L. Christiansen},
  year = {1974},
  doi = {10.3133/gq1209},
  url = {https://pubs.usgs.gov/publication/gq1209},
  note = {Source identifier: gq1209}
}