@misc{indiciae95391da20fd8,
  title = {Closed-Loop Control System for Friction Stir Welding Retractable Pin Tool},
  author = {Ding, R. Jeffrey and Romine, Peter L. and Munafo, Paul M.},
  year = {2001},
  url = {https://ntrs.nasa.gov/citations/20010084735},
  note = {Source identifier: 20010084735}
}