@misc{indiciaefc17d24f2c3b,
  title = {Versatile Lightweight Ladder},
  author = {Breen, Clarence F. and Fogle, John W. and Macconochie, Ian O.},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/19930000337},
  note = {Source identifier: 19930000337}
}