@misc{indiciae430544ad25a8,
  title = {Soft X-ray background flux.},
  author = {Bunner, A. N. and Coleman, P. C. and Kraushaar, W. L. and Mccammon, D. and Palmieri, T. M. and Shilepsky, A. and Ulmer, M.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19690065231},
  note = {Source identifier: 19690065231}
}