@misc{indiciae24e10ccfa636,
  title = {HYPERMAG; an interactive, 2- and 2 1/2-dimensional gravity and magnetic modeling program; version 3.5},
  author = {R. W. Saltus and R.J. Blakely},
  year = {1993},
  doi = {10.3133/ofr93287},
  url = {https://pubs.usgs.gov/publication/ofr93287},
  note = {Source identifier: ofr93287}
}