erc: who: Pekelsma, Robert E. what: The Behavior of Thin-Will Monocoque Cylinders Under Torsional Vibration when: 19370800 where: https://digital.library.unt.edu/ark:/67531/metadc54339/ erc-support: who: University of North Texas Libraries what: Permanent: Stable Content: when: 20081203 where: https://digital.library.unt.edu/ark:/67531/