@misc{indiciae130d0ec52cbb,
  title = {Radiation Shielding for Space Flight},
  author = {Blattnig, Steve R. and Norbury, John W. and Norman, Ryan B.},
  year = {2003},
  url = {https://ntrs.nasa.gov/citations/20040000799},
  note = {Source identifier: 20040000799}
}