@misc{indiciae6c3fbe8ee8d2,
  title = {Isostatic residual gravity and crustal geology of the United States},
  author = {Robert C. Jachens and Robert W. Simpson and Richard J. Blakely and Richard W. Saltus},
  year = {1989},
  doi = {10.1130/mem172-p405},
  url = {https://pubs.usgs.gov/publication/70209801},
  note = {Source identifier: 70209801}
}