erc: who: Weaver, F. J. what: Aging of polyurethane foam insulation in simulated refrigerator panels -- Initial results with third-generation blowing agents when: 19981100 where: https://digital.library.unt.edu/ark:/67531/metadc678524/ erc-support: who: University of North Texas Libraries what: Permanent: Stable Content: when: 20081203 where: https://digital.library.unt.edu/ark:/67531/