@misc{indiciae22be8d4e5518,
  title = {Unified hatch system},
  author = {Hart, R. J. and Walkover, L. J. and Zosky, E. W.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19710000094},
  note = {Source identifier: 19710000094}
}