@misc{indiciae2037ea81b94e,
  title = {Extrusion die for refractory metals Patent},
  author = {Gyorgak, C. A. and Hoover, R. J.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19710014341},
  note = {Source identifier: 19710014341}
}