@misc{indiciae95b2974b67fe,
  title = {IPCS implications for future supersonic transport aircraft},
  author = {Billig, L. O. and Kniat, J. and Schmidt, R. D.},
  year = {1976},
  url = {https://ntrs.nasa.gov/citations/19760024065},
  note = {Source identifier: 19760024065}
}