@misc{indiciae109043f99920,
  title = {Determining Equilibrium Position For Acoustical Levitation},
  author = {Barmatz, M. B. and Aveni, G. and Putterman, S. and Rudnick, J.},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19890000421},
  note = {Source identifier: 19890000421}
}