@misc{indiciae6a04ae3930a3,
  title = {A hardware simulation of a lunar midcourse navigation system using statistical filter theory and hand-held sextant observations},
  author = {Christensen, J. V. and Mc Gee, L. A.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19700000940},
  note = {Source identifier: 19700000940}
}