1. Free spheroidal vibrations of the Earth at very long periods;Alsop;Bull. Seism. Soc. Amer.,1963
2. Excitation of free oscillations of the Earth by the Kurile Islands earthquake of 13 October, 1963;Alsop;Bull. Seism. Soc. Amer.,1964
3. Free periods of the Earth observed at eight stations around the world;Alsop;Bull. Seism. Soc. Amer.,1964
4. Free oscillations of the Earth observed on strain and pendulum seismographs;Alsop;J. Geophys. Res.,1961
5. Propagation of a P-pulse in a solid sphere;Alterman;Bull. Seism. Soc. Amer.,1965