@misc{indiciaea80e690cf353,
  title = {Microprocessor implementation of an FFT for ionospheric VLF observations},
  author = {Elvidge, J. and Kintner, P. and Holzworth, R.},
  year = {1984},
  url = {https://ntrs.nasa.gov/citations/19840040561},
  note = {Source identifier: 19840040561}
}