erc:
who: Kersh, Thomas E.
what: Improvement in Plows.
when: 18770227
where: https://texashistory.unt.edu/ark:/67531/metapth166639/
erc-support:
who: University of North Texas Libraries
what: Permanent: Stable Content:
when: 20081203
where: https://texashistory.unt.edu/ark:/67531/