@misc{indiciae4022eedcf1a8,
  title = {The first Mars orbiters},
  author = {Forney, R. G. and Haynes, N. R. and Laeser, R. P. and Rygh, P. J. and Schneiderman, D. and Steinbacher, R. H.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19700063681},
  note = {Source identifier: 19700063681}
}