%0 E-Resource %0 U.S. Federal Government Document %0 Book %A Singleterry, Robert C. %E Langley Research Center %E United States. National Aeronautics and Space Administration %I National Aeronautics and Space Administration, Langley Research Center %D 2015 %C Hampton, Virginia %G English %B NASA technical publication ; %T A launch requirements trade study for active space radiation shielding for long duration human missions %U http://purl.fdlp.gov/GPO/gpo62966