@misc{indiciaeae69393f704c,
  title = {Ellipsoidal corrections for geoid undulation computations using gravity anomalies in a cap},
  author = {Rapp, R. H.},
  year = {1981},
  url = {https://ntrs.nasa.gov/citations/19820031752},
  note = {Source identifier: 19820031752}
}