erc:
who: Van Katwijk, Carl
what: Fisher Helium Purge Flow Control Valve and Relay
when: 20000713
where: https://digital.library.unt.edu/ark:/67531/metadc733903/
erc-support:
who: University of North Texas Libraries
what: Permanent: Stable Content:
when: 20081203
where: https://digital.library.unt.edu/ark:/67531/