@misc{indiciaea7372fc58724,
  title = {Space shuttle guidance, navigation and control equation document no. 4: Precision state and filter weighting matrix extrapolation},
  author = {Robertson, W. M.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19730010904},
  note = {Source identifier: 19730010904}
}