@misc{indiciae3fef1382a732,
  title = {Transcontinental geophysical survey (35°-39° N): Bouguer gravity map from 112° W longitude to the coast of California},
  author = {the U.S. Air Force Aeronautical Chart and Information Center},
  year = {1968},
  doi = {10.3133/i532b},
  url = {https://pubs.usgs.gov/publication/i532B},
  note = {Source identifier: i532B}
}