@misc{indiciaed3afca9b49e6,
  title = {Nonlinear effects on sonic boom intensity},
  author = {Hilding, L. and Landahl, M. T. and Ryhming, I. L.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19680025447},
  note = {Source identifier: 19680025447}
}