TY - BOOK AU - Zhang, Liping AU - Chopra, Anil K., coaut. ED - University of California, Berkeley. Earthquake Engineering -Research Center TI - Computation of spatially varying ground motion and foundati-on-rock impedance matrices for seismic analysis of arch dam-s / by Liping Zhang, Anil K. Chopra CY - Berkeley, Calif. : g Research Center ER -