@misc{indiciae113d7555af2d,
  title = {Error analysis of the Mars gravitational field estimation using range and range-rate data from a viking-type orbiter},
  author = {Compton, H. R. and Daniels, E. F.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19710013145},
  note = {Source identifier: 19710013145}
}