References
- EICHER , D. L. 1973 . Geologic Time , 141 London : Prentice Hall .
- OKADA , M. 1943 . Studies on the periodic patterns of hard tissues of animal body . Shanghai Even. Post, Med. Ed. , Sept. : 26 – 31 .
- ROSENBERG , G. D. and RUNCORN , S. K. , eds. 1975 . Growth Rhythms and the History of the Earth's Rotation , 538 London : John Wiley .
- SCRUTTON , C. T. 1965 . Periodicity in Devonian Coral Growth . Palaeontology , 7 : 552 – 528 .
- WATKINS , N. D. 1975 . Correlating stratigraphic zones and polarities . Geotimes , 20 : 26 – 27 .
- WELLS , J. W. 1963 . Coral growth and geochronometry . Nature (Lond.) , 197 : 948 – 950 .
- Geophysics Dept, The University, Newcastle Upon Tyne, NE1 7RU Great Britain. Present address: Dept of Orthopedic Surgery, Washington Univ., Med. School, Box 8109, St Louis, Missouri 63110, U.S.A.