1. Nagata, T., ‘Special Report on Palæomagnetism’, Trans. Rome Meeting A.G.A., I.U.G.G., 343.
2. Yoshikawa, T., and Toya, H., Antarctic Report, No. 1, 1 (1957). Tatsumi, T., and Kikuchi, T., Antarctic Report, No. 7 (1959) (in the press).
3. Gough, D. I., Mon. Not. Roy. Astro. Soc., Geophys. Suppl., 7, 196 (1956).
4. Irving, E., and Green, R., Geophys. J. Roy. Astro. Soc., 1, 64 (1958).
5. See, for example, a summary by Irving, E., Geophys. J. Roy. Astro. Soc., 2, 51 (1959).