erc: who: Geological Survey (U.S.) what: Dodd Quadrangle when: 1980 where: https://texashistory.unt.edu/ark:/67531/metapth108989/ erc-support: who: University of North Texas Libraries what: Permanent: Stable Content: when: 20081203 where: https://texashistory.unt.edu/ark:/67531/