erc:
who: Havill, Clinton H.
what: The Drag of Airships I
when: 19260900
where: https://digital.library.unt.edu/ark:/67531/metadc59689/
erc-support:
who: University of North Texas Libraries
what: Permanent: Stable Content:
when: 20081203
where: https://digital.library.unt.edu/ark:/67531/