erc:
who: United States. Office of Civil Defense.
what: America calling : take your place in civilian defense.
when: 1941
where: https://digital.library.unt.edu/ark:/67531/metadc580/
erc-support:
who: University of North Texas Libraries
what: Permanent: Stable Content:
when: 20081203
where: https://digital.library.unt.edu/ark:/67531/