@misc{indiciae21a6be6ae934,
  title = {Electrons at low altitudes: A difficult background problem for soft X-ray astronomy},
  author = {Seward, F. D. and Grader, R. J. and Toor, A. and Burginyon, G. A. and Hill, R. W.},
  year = {1974},
  url = {https://ntrs.nasa.gov/citations/19740020134},
  note = {Source identifier: 19740020134}
}