1. Stochastic processes in civil engineering. Ph.D. Thesis, Department of Civil Engineering, Stanford University, 1964.
2. . On seismicity. Seminar on Applications of Statistics in Structural Mechanics, Civil and Mechanical Engineering, University of Pennsylvania, May 1966.
3. . The major influences on seismic risk. Proceedings of the 4th World Conference on Earthquake Engineering, Santiago, Chile, 1969.
4. Elementary Seismology. W.H. Freeman and Co.: San Francisco, 1958.