@misc{indiciae583895a7f982,
  title = {Geology and ground-water hydrology of the Mokelumne area, California},
  author = {A. M. Piper and H. S. Gale and H. E. Thomas and T. W. Robinson},
  year = {1939},
  doi = {10.3133/wsp780},
  url = {https://pubs.usgs.gov/publication/wsp780},
  note = {Source identifier: wsp780}
}