@misc{indiciae3fbce4b5c399,
  title = {Improved methods for fan sound field determination},
  author = {Cicon, D. E. and Sofrin, T. G. and Mathews, D. C.},
  year = {1981},
  url = {https://ntrs.nasa.gov/citations/19810007254},
  note = {Source identifier: 19810007254}
}