@misc{indiciae442c39bf8e91,
  title = {Simple Bouguer gravity anomaly map, Rolla 1° x 2° quadrangle, Missouri},
  author = {Lindrith Cordell and Jackie M. Williams},
  year = {1978},
  doi = {10.3133/ofr78806},
  url = {https://pubs.usgs.gov/publication/ofr78806},
  note = {Source identifier: ofr78806}
}