@misc{indiciae8953fb771d1a,
  title = {A study of solar-system geometric parameters for use as interplanetary navigation aids},
  author = {Blackshear, W. T. and Johnson, K. G.},
  year = {1965},
  url = {https://ntrs.nasa.gov/citations/19650019137},
  note = {Source identifier: 19650019137}
}