1. Knopoff, L., Proc. U.S. Japan Conf. Res. Related to Earthquake Prediction, 61 (1964).
2. Carder, D. S., Seismic Investigations in the Boulder Dam Area, 1940–1944, and the Influence of Reservoir Loading on Local Earthquake Activity, B.S.S.A., 35, 175 (1945).
3. Gough, D. I., and Gough, Mrs. D. I. (personal communication).
4. McGinnis, L. D., Illinois State Geol. Survey, Urbana, Circular 344 (1963).
5. Matuzawa, Takeo, Study of Earthquakes III, Swarms of Earthquakes, Foreshocks and Aftershocks, 57 (1964).