@misc{indiciaec7d9684e42b0,
  title = {The many uses of the dirigible.},
  author = {Hunt, J. R. and Levitt, B. B. and Morse, F. and Stehling, K. R. and Vaeth, J. G.},
  year = {1973},
  url = {https://ntrs.nasa.gov/citations/19730059421},
  note = {Source identifier: 19730059421}
}