erc: who: Geological Survey (U.S.) what: Melrose Quadrangle when: 1984 where: https://texashistory.unt.edu/ark:/67531/metapth106958/ erc-support: who: University of North Texas Libraries what: Permanent: Stable Content: when: 20081203 where: https://texashistory.unt.edu/ark:/67531/