1. Hart, R. A. & Hogan, L. G. in A.E.P.S. 3, Terrestrial Rare Gases, 193 (eds Alexander, E. C. Jr & Ozima, M. (Cent. Acad. Publ. Japan, Tokyo, 1978).
2. Hart, R. A. & Dymond, J. Short Papers of the 4th int. Conf. on Geochronology, Cosmology, and Isotope Geology (ed. Zartman, R. E.) 78–701 (USGS Open File-Report, 1978).
3. Saito, K., Basu, A. R. & Alexander, E. C. Earth Pl.anet. Sci. Lett. 39, 274 (1978).
4. Kaneoka, I., Takaoka, N. & Aoki, K. in A.E.P.S. 3, Terrestrial Rare Gases, (eds Alexander, E. C. Jr. & Ozima, M.) (Cent. Acad. Publ. Japan, Tokyo, 1978).
5. Thompson, D. P., Basu, A. R., Hennecke, E. W. & Manuel, O. K. Phys. Earth Planet. Int. 17, 19 (1978).