TY - RPRT TI - Thick Galactic Cosmic Radiation Shielding Using Atmospheric Data AU - Youngquist, Robert C. AU - Nurge, Mark A. AU - Starr, Stanley O. AU - Koontz, Steven L. PY - 2013 UR - https://ntrs.nasa.gov/citations/20130014272 ID - 20130014272 ER -