@misc{indiciae008e6b8cebb7,
  title = {Optimizing acoustical treatment},
  author = {Beuran, N. and Ramboiu, S. and Farcas, I. and Halpert, E.},
  year = {1974},
  url = {https://ntrs.nasa.gov/citations/19740020004},
  note = {Source identifier: 19740020004}
}