erc: who: Lange, Eric E. Roden Matilde M. Urrutia Mark O. Barnett Clifford R. what: Final Scientific/Technical Report-EMSP 73914 when: 20050718 where: https://digital.library.unt.edu/ark:/67531/metadc785259/ erc-support: who: University of North Texas Libraries what: Permanent: Stable Content: when: 20081203 where: https://digital.library.unt.edu/ark:/67531/