@misc{indiciae627f2b73b713,
  title = {Natural gamma aeroradioactivity map of parts of the San Francisco region, California},
  author = {K. G. Books},
  year = {1965},
  doi = {10.3133/gp483},
  url = {https://pubs.usgs.gov/publication/gp483},
  note = {Source identifier: gp483}
}