@misc{indiciae301bd75ab9cd,
  title = {2-20 keV X-ray sky background},
  author = {Boldt, E. A. and Desai, U. D. and Holt, S. S. and Serlemitsos, P. J.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19700064577},
  note = {Source identifier: 19700064577}
}