@misc{indiciae00ffd8a2da9d,
  title = {A new, simple electrostatic-acoustic hybrid levitator},
  author = {Lierke, E. G. and Loeb, H. and Gross, D.},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19910012056},
  note = {Source identifier: 19910012056}
}