@misc{indiciaeea9abf288a34,
  title = {Acoustic composition sensor for cryogenic gas mixtures},
  author = {Shakkottai, P. and Kwack, E. Y. and Luchik, T. S. and Back, L. H.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19930064670},
  note = {Source identifier: 19930064670}
}