TY - RPRT TI - Shield Optimization in Simple Geometry for the Gateway Concept AU - Tripathi, R. K. AU - Simonsen, L. C. AU - Nealy, J. E. AU - Troutman, P. A. AU - Wilson, J. W. PY - 2002 UR - https://ntrs.nasa.gov/citations/20040085696 ID - 20040085696 ER -