@misc{indiciae88e7bc6ec0d5,
  title = {Helicopter sling loads},
  author = {Shaughnessy, J. D. and Yenni, K. R. and Deaux, T. N.},
  year = {1980},
  url = {https://ntrs.nasa.gov/citations/19790000544},
  note = {Source identifier: 19790000544}
}