@misc{indiciaea231d932be8f,
  title = {GRAVPOLY; a modification of a three-dimensional gravity modeling program},
  author = {Richard H. Godson},
  year = {1983},
  doi = {10.3133/ofr83346},
  url = {https://pubs.usgs.gov/publication/ofr83346},
  note = {Source identifier: ofr83346}
}