@misc{indiciae3dfa410b8e77,
  title = {Surficial geologic map of the Yellowstone National Park},
  author = {G.L. Richmond and K. L. Pierce and H.A. Waldrop},
  year = {1972},
  doi = {10.3133/i710},
  url = {https://pubs.usgs.gov/publication/i710},
  note = {Source identifier: i710}
}