1. The early history of the moon and the earth;Alfvén;Icarus,1963
2. Two alternatives for the history of the moon;Alfvén;Science,1969
3. The origin of the moon, 2;Berlage,1967
4. The origin of the moon, 4;Bullen,1967
5. Formation of the earth-moon system;Cameron;Tram. AGU,1970