@misc{indiciae88506f8cad52,
  title = {Space Shuttle Redesigned Solid Rocket Motor nozzle natural frequency variations with burn time},
  author = {Lui, C. Y. and Mason, D. R.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19910057123},
  note = {Source identifier: 19910057123}
}