erc: who: Lovering, Tom G. what: Progress in Radioactive Iron Oxides Investigations when: 19540600 where: https://digital.library.unt.edu/ark:/67531/metadc1050333/ erc-support: who: University of North Texas Libraries what: Permanent: Stable Content: when: 20081203 where: https://digital.library.unt.edu/ark:/67531/