@misc{indiciaed029d1210724,
  title = {Observational result on x-rays.},
  author = {Clark, D. B. and Fisher, P. C. and Meyerott, A. J. and Smith, K. L.},
  year = {1964},
  url = {https://ntrs.nasa.gov/citations/19650033789},
  note = {Source identifier: 19650033789}
}