@misc{indiciae91fce7be829a,
  title = {MAGPOLY; a modification of a three-dimensional magnetic modelling program},
  author = {Richard H. Godson},
  year = {1983},
  doi = {10.3133/ofr83345},
  url = {https://pubs.usgs.gov/publication/ofr83345},
  note = {Source identifier: ofr83345}
}