@misc{indiciaec1e90fa52dd4,
  title = {Onboard navigation - The near-earth options},
  author = {Kurzhals, P. S. and Fuchs, A. J.},
  year = {1980},
  url = {https://ntrs.nasa.gov/citations/19810034951},
  note = {Source identifier: 19810034951}
}