@misc{indiciae39c06ffd1496,
  title = {VARMAG; a Fortran program to implement the variable-magnetization terrain-correction method for aeromagnetic data},
  author = {V.J. Grauch},
  year = {1986},
  doi = {10.3133/ofr86268},
  url = {https://pubs.usgs.gov/publication/ofr86268},
  note = {Source identifier: ofr86268}
}