@misc{indiciae2aa0aa61b9b1,
  title = {Dual frequency /20.0 - 19.9 kHz/ VLF data},
  author = {Looney, C. H., Jr.},
  year = {1967},
  url = {https://ntrs.nasa.gov/citations/19670009441},
  note = {Source identifier: 19670009441}
}