@misc{indiciaec927fa1e6183,
  title = {Thick Galactic Cosmic Radiation Shielding Using Atmospheric Data},
  author = {Youngquist, Robert C. and Nurge, Mark A. and Starr, Stanley O. and Koontz, Steven L.},
  year = {2013},
  url = {https://ntrs.nasa.gov/citations/20130014272},
  note = {Source identifier: 20130014272}
}