@misc{indiciae13224c67f299,
  title = {Geologic map of the North Fork of the American River Wilderness Study Area and adjacent parts of the Sierra Nevada, California},
  author = {D. S. Harwood},
  year = {1980},
  doi = {10.3133/mf1177a},
  url = {https://pubs.usgs.gov/publication/mf1177A},
  note = {Source identifier: mf1177A}
}