@misc{indiciae47f5f9f34461,
  title = {Orbit determination for lunar parking orbits using time-varying orbital elements},
  author = {Bullock, M. V. and Ferrari, A. J.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19700018928},
  note = {Source identifier: 19700018928}
}