@misc{indiciae81a178bdd16f,
  title = {Preliminary structure contour map of the Sacramento Valley, California, showing major late Cenozoic structural features and depth to basement},
  author = {David S. Harwood and Edward J. Helley},
  year = {1982},
  doi = {10.3133/ofr82737},
  url = {https://pubs.usgs.gov/publication/ofr82737},
  note = {Source identifier: ofr82737}
}