1. Osmaston, M. F., Nature, 216, 1096 (1967).
2. Munk, W. H., and MacDonald, G. J. F., The Rotation of the Earth (Cambridge Univ. Press, 1960).
3. Little, W., Fowler, H. W., and Coulson, J., The Shorter Oxford Dictionary (revised and ed. by Onions, C. T.), (Clarendon Press, Oxford, 1959).
4. Kozai, Y., Proc. COSPAR-IAU-IUTAM Symp. (Paris, 1965).
5. Paddack, S. J., J. Geophys. Res., 72, 5760 (1967).