@misc{indiciaec07f5c98af14,
  title = {Resonance tube igniter},
  author = {Conrad, E. W. and Pavli, A. J. and Phillips, B. R.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19700000598},
  note = {Source identifier: 19700000598}
}