@misc{indiciae17d54ac8c575,
  title = {The navigation of space probes},
  author = {Fliegel, H. F. and Ohandley, D. A. and Zielenbach, J. W.},
  year = {1974},
  url = {https://ntrs.nasa.gov/citations/19740051825},
  note = {Source identifier: 19740051825}
}