@misc{indiciaebfca56c84e5d,
  title = {Soft X-ray imaging with a normal incidence mirror},
  author = {Underwood, J. H. and Barbee, T. W., Jr.},
  year = {1981},
  url = {https://ntrs.nasa.gov/citations/19820033037},
  note = {Source identifier: 19820033037}
}