erc:
who: Williams, Donald Earl
what: American Export Trade with Mexico
when: 1948
where: https://digital.library.unt.edu/ark:/67531/metadc75672/
erc-support:
who: University of North Texas Libraries
what: Permanent: Stable Content:
when: 20081203
where: https://digital.library.unt.edu/ark:/67531/