erc:
who: United States. Dept. of Agriculture.
what: Wheat production in the eastern United States.
when: 19510900
where: https://digital.library.unt.edu/ark:/67531/metadc3394/
erc-support:
who: University of North Texas Libraries
what: Permanent: Stable Content:
when: 20081203
where: https://digital.library.unt.edu/ark:/67531/