@misc{indiciae135d4f8fca40,
  title = {A proposed performance index for galactic cosmic ray shielding materials},
  author = {Wilson, John W. and Wood, J. S. and Shinn, Judy L. and Cucinotta, Francis A. and Nealy, John E.},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/19940006806},
  note = {Source identifier: 19940006806}
}