@misc{indiciae309a84afdf20,
  title = {Surveyor guidance program.},
  author = {Davids, L. H. and Gans, J. F. and Ribarich, J. J.},
  year = {1967},
  url = {https://ntrs.nasa.gov/citations/19670050870},
  note = {Source identifier: 19670050870}
}