@misc{indiciae2c22be32e733,
  title = {Self-actuating grapple automatically engages and releases loads from overhead cranes},
  author = {Froehlich, J. A. and Karastas, G. A.},
  year = {1966},
  url = {https://ntrs.nasa.gov/citations/19660000520},
  note = {Source identifier: 19660000520}
}