1. Goldberg, E. D. in Oceanography (ed. Sears, M.) 583–589 (A.A.A.S, Washington DC, 1961).
2. Bender, M. L., Ku, T. L. & Broecker, W. S. Science 151, 325–328 (1966).
3. Barnes, S. S. & Dymond, J. R. Nature 213, 1218–1219 (1967).
4. Ku, T. L. & Broecker, W. S. Deep-Sea Res. 16, 625–637 (1969).
5. Arrhenius, G. Trans. Am. Geophys. Un. U.S.A. natn. Rep. 1963–1967, 604 (1967).