1
Cosmochemistry [E-Book] : Proceedings of the Symposium on Cosmochemistry, Held at the Smithsonian Astrophysical Observatory, Cambridge, Mass., August 14–16, 1972 /
2
The Earth-Moon System [E-Book] : Proceedings of an international conference, January 20–21,1964, sponsored by the Institute for Space Studies of the Goddard Space Flight Center, NASA /