@misc{indiciaedc59e57aa2f2,
  title = {Venus gravity - A harmonic analysis},
  author = {Bills, Bruce G. and Jones, Robert L. and Kiefer, Walter S.},
  year = {1987},
  url = {https://ntrs.nasa.gov/citations/19880024439},
  note = {Source identifier: 19880024439}
}