@misc{indiciae81f6d3f1a299,
  title = {Geologic map of Yellowstone National Park},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1972},
  doi = {10.3133/i711},
  url = {https://pubs.usgs.gov/publication/i711},
  note = {Source identifier: i711}
}