@misc{indiciaeb82c6a175045,
  title = {Observation model and parameter partials for the JPL VLBI parameter estimation software MASTERFIT-1987},
  author = {Sovers, O. J. and Fanselow, J. L.},
  year = {1987},
  url = {https://ntrs.nasa.gov/citations/19880009139},
  note = {Source identifier: 19880009139}
}