TY - BOOK AU - Yang, J.N. AU - Sarkani S., coaut.Long, F.X., coaut. ED - National Center for Earthquake Engineering Research (E.U.)State University of New York at Buffalo TI - Modal analysis of nonclassically damped structural systems -using canonical transformation / by J.N. Yang, S. Sarkani a-nd F.X. Long CY - Buffalo, New York : National Center for Earthquake Engineering Research ER -