@misc{indiciae18ab8df0f855,
  title = {Geology of the Sierra Foothills Melange and adjacent areas, Amador County, California},
  author = {Wendell A. Duffield and Robert V. Sharp},
  year = {1975},
  doi = {10.3133/pp827},
  url = {https://pubs.usgs.gov/publication/pp827},
  note = {Source identifier: pp827}
}