@misc{indiciae4007c0cbdc3f,
  title = {ORBITAL RENDEZVOUS CONSIDERATIONS FOR A MARS MISSION},
  author = {Bird, J. D. and Thomas, D. F.},
  year = {1963},
  url = {https://ntrs.nasa.gov/citations/19630028696},
  note = {Source identifier: 19630028696}
}