@misc{indiciae3c50b1377e67,
  title = {Hypermag: An interactive, two-dimensional gravity and magnetic modeling program},
  author = {R. W. Saltus and Richard J. Blakely},
  year = {1983},
  doi = {10.3133/ofr83241},
  url = {https://pubs.usgs.gov/publication/ofr83241},
  note = {Source identifier: ofr83241}
}