1. The Abundance of the Elements;Aller,1961
2. Thermal release of helium, neon and argon from lunar fines and minerals;Baur,1972
3. Noble gas studies on regolith materials from Apollo 14 and 15;Bogard,1972
4. A new table of abundances of the elements in the solar system;Cameron,1968
5. Chemical and petrographic characteristics of the regolith at the Apollo 15 landing site;Carr,1972