por Chen, Jian-Chu | Lysmer, John, coaut.Seed, H. Bolton, coaut | University of California, Berkeley. Earthquake Engineering - Research CenterE. U. Army Research Office.
por Lysmer, John | University of California, Earthquake Engineering Research C-enter.
por Seed, Harry Bolton | Lysmer, John, coaut.Hwang, Richard, coaut | University of California, Earthquake Engineering Research C-enter.