erc: who: Bodvarsson, G.S. what: Analysis of internal wellbore flow when: 19880101 where: https://digital.library.unt.edu/ark:/67531/metadc1106152/ erc-support: who: University of North Texas Libraries what: Permanent: Stable Content: when: 20081203 where: https://digital.library.unt.edu/ark:/67531/