@misc{indiciae755ef607a221,
  title = {Microstructural changes in beta-silicon nitride grains upon crystallizing the grain-boundary glass},
  author = {Lee, William E. and Hilmas, Gregory E.},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19900026175},
  note = {Source identifier: 19900026175}
}