@misc{indiciae7ebc6f13e2f0,
  title = {Ball-joint grounding ring},
  author = {Aperlo, P. J. A. and Buck, P. A. and Weldon, V. A.},
  year = {1981},
  url = {https://ntrs.nasa.gov/citations/19800000405},
  note = {Source identifier: 19800000405}
}