@misc{indiciaedc0708a8e9f5,
  title = {Method of stabilizing flueric vortex valves and vortex amplifiers},
  author = {Erwin, L. R. and Mc Fall, R. H.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19700000648},
  note = {Source identifier: 19700000648}
}