@misc{indiciae58db1f4cc2b8,
  title = {A preliminary design study for a cosmic X-ray spectrometer Interim report},
  author = {Clark, G. W. and Schnopper, H. W.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19700019151},
  note = {Source identifier: 19700019151}
}