@misc{indiciae9077a33d2e53,
  title = {Potential-field geophysical programs for VAX 7xx computers; source code (programs A-G)},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1989},
  doi = {10.3133/ofr89115b},
  url = {https://pubs.usgs.gov/publication/ofr89115B},
  note = {Source identifier: ofr89115B}
}