@misc{indiciaeb64091ba8160,
  title = {Venus Gravity Field Determination: Progress and Concern},
  author = {Sjogren, W. L. and Konopliv, A. S.},
  year = {1994},
  url = {https://ntrs.nasa.gov/citations/20060037721},
  note = {Source identifier: 20060037721}
}