1. Hendy, C. H. & Wilson, A. T. Nature 219, 48–51 (1968).
2. Wilson, A. T. & Grinsted, M. J. D.S.I.R. Bull. 220, 61–66 (DSIR, Wellington, New Zealand, 1978).
3. Emiliani, C. J. Geol. 63, 538–578 (1955).
4. Ferguson, C. W. Science 159, 839–846 (1968).
5. Hendy, C. H. in Radiocarbon Variations and Absolute Chronology (ed. Olsson, I. U.) 419–443 (Wiley, New York, 1970).