@misc{indiciae236e064343d6,
  title = {Viewing Phobos and Deimos for navigating Mariner 9.},
  author = {Duxbury, T. C. and Born, G. H. and Jerath, N.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19720061767},
  note = {Source identifier: 19720061767}
}