@misc{indiciae353b5a0f8446,
  title = {Method for defect free keyhole plasma arc welding},
  author = {Harwig, Dennis D. and Hunt, James F. and Ryan, Patrick M. and Fisher, Walter J.},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/20080004268},
  note = {Source identifier: 20080004268}
}