1. van Andel, Tj. H., Bowen, V. T., Sach, P. L., and Siever, R., Science, 148, 1214 (1965).
2. van Andel, Tj. H., and Bowin, C. O., J. Geophys. Res. (in the press).
3. Melson, W. G., and van Andel, Tj. H., Marine Geol., 4, 165 (1966).
4. Melson, W. G., van Andel, Tj. H., and Thompson, J. (in the press).
5. Nagata, T., Rock Magnetism (Maruzen, Tokyo, 1961).