1. Wangersky, P. J., and Hutchinson, G. E., Nature, 181, 108 (1958).
2. Emiliani, C., J. Geol., 74, 109 (1966).
3. Boström, K., and Fisher, D. E., Geochim. Cosmochim. Acta, 33, 743 (1969).
4. Arrhenius, G., Sediment Cores from the East Pacific, Reports of the Swedish deep sea expedition, V, Göteborgs Kungl. Vetenskaps samhälle (Gothenburg, 1952).
5. Turekian, K. K., in Chemical Oceanography (edit. by Riley, J. P., and Skirrow, G.), 2, 81 (Academic Press, 1965).