erc:
who: Texas. Reclamation Department.
what: Texas - Oklahoma : Red River Big Bend area reduced map.
when: 1921
where: https://texashistory.unt.edu/ark:/67531/metapth252242/
erc-support:
who: University of North Texas Libraries
what: Permanent: Stable Content:
when: 20081203
where: https://texashistory.unt.edu/ark:/67531/