@misc{indiciae01a56e184e14,
  title = {Lunar gravity fields determined from Apollo 8 tracking data},
  author = {Felsentreger, T. L. and Murphy, J. P. and Ryan, J. W. and Salter, L. M.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19690028424},
  note = {Source identifier: 19690028424}
}