@misc{indiciae223b9eea6068,
  title = {Simple Bouguer gravity map of the Rolla 1° by 2° quadrangle, Missouri and Illinois},
  author = {T.G. Hildenbrand and R.P. Kucks and L. E. Cordell and M. F. Kane},
  year = {1979},
  doi = {10.3133/ofr791192},
  url = {https://pubs.usgs.gov/publication/ofr791192},
  note = {Source identifier: ofr791192}
}