@misc{indiciaef7847692df2b,
  title = {Laser Vacuum Furnace for Zone Refining},
  author = {Griner, D. B. and Zurburg, F. W. and Penn, W. M.},
  year = {1986},
  url = {https://ntrs.nasa.gov/citations/19860000519},
  note = {Source identifier: 19860000519}
}