@misc{indiciae1e69a4355394,
  title = {WINDOWLESS TUBES FOR X-RAY SPECTROSCOPY},
  author = {Davidson, F. D. and Wyckoff, R. W. G.},
  year = {1962},
  url = {https://ntrs.nasa.gov/citations/19630002703},
  note = {Source identifier: 19630002703}
}