@misc{indiciae5c1296d837ed,
  title = {High-temperature metal purification using a compact, portable rf heating and levitation system on the wake shield},
  author = {Hahs, C. A.},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19910012050},
  note = {Source identifier: 19910012050}
}