@misc{indiciae702828ad8fe8,
  title = {Star charts for manned space flight},
  author = {Gentry, G. E. and Guillory, T. A. and Oneill, J. W.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19710039651},
  note = {Source identifier: 19710039651}
}