@misc{indiciaeaaa88a69299e,
  title = {Navigation requirements for advanced deep space missions.},
  author = {Friedman, L. D. and Sohn, R. L. and Moore, J. W.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19720048512},
  note = {Source identifier: 19720048512}
}