@misc{indiciaead03d3ad4bb3,
  title = {A Bragg spectrometer for stellar X-ray astronomy.},
  author = {Kestenbaum, H. and Novick, R. and Angel, J. R. P.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19720029373},
  note = {Source identifier: 19720029373}
}