@misc{indiciae07312becc8a2,
  title = {Geologic map of the Big Maria Mountains NE quadrangle, Riverside County, California, and Yuma County, Arizona},
  author = {Warren Bell Hamilton},
  year = {1964},
  doi = {10.3133/gq350},
  url = {https://pubs.usgs.gov/publication/gq350},
  note = {Source identifier: gq350}
}