@misc{indiciaecb454163d4cb,
  title = {Calculative techniques for transonic flows},
  author = {Frey, W. H. and Spreiter, J. R. and Stahara, S. S.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19700012049},
  note = {Source identifier: 19700012049}
}