erc: who: Hansen, F. D. what: Evaluation of constitutive models for crushed salt when: 19960501 where: https://digital.library.unt.edu/ark:/67531/metadc668857/ erc-support: who: University of North Texas Libraries what: Permanent: Stable Content: when: 20081203 where: https://digital.library.unt.edu/ark:/67531/