erc: who: Yancey, R. N. what: Quantitative nondestructive density determinations of very low-density carbon foams when: 19910101 where: https://digital.library.unt.edu/ark:/67531/metadc1059416/ erc-support: who: University of North Texas Libraries what: Permanent: Stable Content: when: 20081203 where: https://digital.library.unt.edu/ark:/67531/