@misc{indiciae5a9f30c7d515,
  title = {Improved acoustic levitation apparatus},
  author = {Berge, L. H. and Johnson, J. L. and Oran, W. A. and Reiss, D. A.},
  year = {1980},
  url = {https://ntrs.nasa.gov/citations/19790000567},
  note = {Source identifier: 19790000567}
}