@misc{indiciae4938bd8f92fb,
  title = {Fast Fourier Transform Spectral Analysis Program},
  author = {Daniel, J. A., Jr. and Graves, M. L. and Hovey, N. M.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19690000425},
  note = {Source identifier: 19690000425}
}