@misc{indiciae1ac3a091b4c1,
  title = {Geologic map of the Chico monocline and northwestern part of the Sacramento Valley, California},
  author = {D. S. Harwood and E. J. Helley and M.P. Doukas},
  year = {1981},
  doi = {10.3133/i1238},
  url = {https://pubs.usgs.gov/publication/i1238},
  note = {Source identifier: i1238}
}