@misc{indiciaeb5a6886b8666,
  title = {A new isostatic residual gravity map of the conterminous United States},
  author = {Robert W. Simpson and Robert C. Jachens and Richard W. Saltus and Richard J. Blakely},
  year = {1985},
  doi = {10.1190/1.1892727},
  url = {https://pubs.usgs.gov/publication/70209850},
  note = {Source identifier: 70209850}
}