@misc{indiciae04f176aa2799,
  title = {Lightweight refractory insulation and method of preparing the same Patent},
  author = {Mountvala, A. J. and Nakamura, H. H. and Rechter, H. L.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19710006649},
  note = {Source identifier: 19710006649}
}