erc:
who: Wm. M. Bradley & Co.
what: County & township map of the state of Illinois.
when: 1887
where: https://texashistory.unt.edu/ark:/67531/metapth310620/
erc-support:
who: University of North Texas Libraries
what: Permanent: Stable Content:
when: 20081203
where: https://texashistory.unt.edu/ark:/67531/