1. Premonitory changes in seismic velocities and prediction of earthquakes;Aggarwal;Nature,1973
2. Variations in mean apparent focal depth preceding the September 4, 1972, Stone Canyon earthquake, abstract;Bufe;EOS,1973
3. Premonitory seismic wave phenomena before two earthquakes in Nevada;Gupta;EOS,1974
4. Catalog of earthquakes along the San Andreas fault system in central California for the year 1971;Lee;U.S. Geol. Surv. Open-file Report,1972