@misc{indiciae8b8ea30e9189,
  title = {Absorption of X-rays in the interstellar medium},
  author = {Ride, S. K. and Walker, A. B. C., Jr.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19780032250},
  note = {Source identifier: 19780032250}
}