@misc{indiciae5eae042d9459,
  title = {Microstructural changes in Beta-silicon nitride grains upon crystallizing the grain-boundary glass},
  author = {Lee, William E. and Hilmas, Gregory E. and Lange, F. F.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19910022649},
  note = {Source identifier: 19910022649}
}