@misc{indiciae2b51fff2c5f8,
  title = {Simple Bouguer gravity map of Fairfax and Arlington counties, Virginia},
  author = {David L. Daniels},
  year = {1980},
  doi = {10.3133/ofr80848},
  url = {https://pubs.usgs.gov/publication/ofr80848},
  note = {Source identifier: ofr80848}
}