@misc{indiciae008c34f90f38,
  title = {Preliminary documentation for a FORTRAN program to compute gravity terrain corrections based on topography digitized on a geographic grid},
  author = {Donald Plouff},
  year = {1977},
  doi = {10.3133/ofr77535},
  url = {https://pubs.usgs.gov/publication/ofr77535},
  note = {Source identifier: ofr77535}
}