erc:
who: Harper & Brothers
what: Map showing the comparitive area of the Northern and Southern states east of the Rocky Mountains, 1861.
when: 1861
where: https://texashistory.unt.edu/ark:/67531/metapth251990/
erc-support:
who: University of North Texas Libraries
what: Permanent: Stable Content:
when: 20081203
where: https://texashistory.unt.edu/ark:/67531/