erc: who: Park, Y. J. what: Displacement Based Seismic Design Criteria when: 19990329 where: https://digital.library.unt.edu/ark:/67531/metadc739437/ erc-support: who: University of North Texas Libraries what: Permanent: Stable Content: when: 20081203 where: https://digital.library.unt.edu/ark:/67531/