@misc{indiciaef77736d3d375,
  title = {A dynamic model of Venus's gravity field},
  author = {Kiefer, W. S. and Richards, M. A. and Hager, B. H. and Bills, B. G.},
  year = {1984},
  url = {https://ntrs.nasa.gov/citations/19850027532},
  note = {Source identifier: 19850027532}
}