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2. Ewing, M., Worzel, J. L. Hersey, J. B., Press, F. and Hamilton, G. R. (1950):“Seismic Refraction Measurements in the Atlantic Ocean Basin, Part I,” Bull. Seism. Soc. Amer. 40 (3), p.p.233-242.
3. Heck, N. H. (1947):“List of seismic sea waves,” Bull. Seism. Soc. Amer. 37 (4), p.p.269-286.
4. Imamura, A. (1934): (In Japanese).
5. Lamb, H. (1932): Hydrodynamics.