@misc{indiciae5e788662ca3f,
  title = {Preliminary geologic map of the Tracy quadrangle, San Joaquin County, California},
  author = {T. W. Dibblee},
  year = {1981},
  doi = {10.3133/ofr81464},
  url = {https://pubs.usgs.gov/publication/ofr81464},
  note = {Source identifier: ofr81464}
}