@misc{indiciaef275d2d347f5,
  title = {The 4D area navigation system description and flight test results},
  author = {Lee, H. Q. and Neuman, F. and Hardy, G. H.},
  year = {1975},
  url = {https://ntrs.nasa.gov/citations/19750022064},
  note = {Source identifier: 19750022064}
}