TY - BOOK AU - Roha, Catherine AU - Axley, James W., coaut.Bertero, Vitelmo V., coaut. ED - University of California, Berkeley. Earthquake Engineering -Research Center TI - performance of stairways in earthquakes / by Catherine Roha-, James W. Axley, Vitelmo V. Bertero CY - Berkeley, Calif. : University of California, College of Engineering N1 - "A report on research sponsored by the National Science Fou-ndation" ER -