1. Outer planet satellite return missions using in situ propellant production
2. Autonomous oxygen production for a Mars return vehicle;Ash;IAF-82-210,1982
3. An analysis of alternate hydrogen sources for lunar materials to earth orbit;Frisbee;AIAA Paper 83-1344,1983
4. Mass sample return mission;deVries,1984
5. A new look at oxygen production on Mars-ISPP;Lawton,1985