TY - RPRT TI - Chemical and Solar Electric Propulsion Systems Analyses for Mars Sample Return Missions AU - Donahue, Benjamin B. AU - Green, Shaun E. AU - Coverstone, Victoria L. AU - Woo, Byoungsam PY - 2004 UR - https://ntrs.nasa.gov/citations/20040085768 ID - 20040085768 ER -